diff --git a/.github/workflows/e2e-ddil.yml b/.github/workflows/e2e-ddil.yml
index 42d5cd8b1..647ef55bf 100644
--- a/.github/workflows/e2e-ddil.yml
+++ b/.github/workflows/e2e-ddil.yml
@@ -10,10 +10,11 @@ on:
         required: false
         default: ""
 
-# Shared with e2e-nightly.yml, e2e-suites.yml and e2e-ddil.yml: every one of
-# them provisions on the same runner pools and the same hypervisors, so two in
+# Shared with e2e-nightly.yml and e2e-suites.yml: every one of them provisions
+# many cells on the same runner pools and the same hypervisors, so two in
 # flight compete for their disks and their libvirt guests. Queued rather than
-# cancelled — a run in progress is someone's result, not a stale one.
+# cancelled — a run in progress is someone's result, not a stale one. e2e.yml
+# is outside the group: one cluster per run is cheap enough to overlap.
 concurrency:
   group: e2e-hypervisors
   cancel-in-progress: false
diff --git a/.github/workflows/e2e-nightly.yml b/.github/workflows/e2e-nightly.yml
index eb7f31959..e6fc1d647 100644
--- a/.github/workflows/e2e-nightly.yml
+++ b/.github/workflows/e2e-nightly.yml
@@ -21,17 +21,17 @@ permissions:
 # second rather than cancelling it: a dispatch is usually a verification run
 # and discarding it loses the result someone is waiting on.
 #
-# The group is shared with e2e.yml, e2e-suites.yml and e2e-ddil.yml, which draw
-# on the same runner pools. A per-workflow group let a push-triggered E2E land
-# on top of a nightly cell and take libvirt down under both.
+# The group is shared with e2e-suites.yml and e2e-ddil.yml, which draw on the
+# same runner pools. e2e.yml is deliberately outside it: a single-cluster push
+# run is cheap enough to overlap, and grouping it stalled every push behind a
+# multi-hour nightly.
 concurrency:
   group: e2e-hypervisors
   cancel-in-progress: false
 
 # Scheduled runs are loaded from the default branch (main), so the schedule
 # trigger must stay in sync on main for cron to fire — and so must the
-# concurrency block above. main currently has none, which is why the nightly
-# cron runs ungrouped and a dispatch on any branch can land on top of it.
+# concurrency block above.
 env:
   GIT_BRANCH: ${{ github.event_name == 'schedule' && 'dev' || github.ref_name }}
   UBUNTU_GOLD_IMAGE: /mnt/disk1/gold-images/spinifex-image-builder-ubuntu-26.04.qcow2
@@ -125,7 +125,7 @@ jobs:
       max-parallel: 3
       matrix:
         include: ${{ fromJSON(needs.select.outputs.cells) }}
-    runs-on: [ self-hosted, "${{ matrix.runner }}" ]
+    runs-on: [self-hosted, "${{ matrix.runner }}"]
     timeout-minutes: ${{ matrix.timeout_minutes || 50 }}
     env:
       TOFU_LOG: /tmp/e2e-nightly-cell-${{ matrix.cell }}-${{ github.run_id }}.log
@@ -1478,7 +1478,17 @@ jobs:
   # every cell so this runs last; always() so a red run is the one it describes.
   summary:
     name: run summary
-    needs: [select, matrix, baremetal, diskperf, iso-single, iso-multi, performance, stress]
+    needs:
+      [
+        select,
+        matrix,
+        baremetal,
+        diskperf,
+        iso-single,
+        iso-multi,
+        performance,
+        stress,
+      ]
     if: always()
     runs-on: ubuntu-26.04
     steps:
diff --git a/.github/workflows/e2e-suites.yml b/.github/workflows/e2e-suites.yml
index 630cac569..31a40c6bb 100644
--- a/.github/workflows/e2e-suites.yml
+++ b/.github/workflows/e2e-suites.yml
@@ -43,10 +43,11 @@ on:
         required: false
         default: ""
 
-# Shared with e2e-nightly.yml, e2e-suites.yml and e2e-ddil.yml: every one of
-# them provisions on the same runner pools and the same hypervisors, so two in
+# Shared with e2e-nightly.yml and e2e-ddil.yml: every one of them provisions
+# many cells on the same runner pools and the same hypervisors, so two in
 # flight compete for their disks and their libvirt guests. Queued rather than
-# cancelled — a run in progress is someone's result, not a stale one.
+# cancelled — a run in progress is someone's result, not a stale one. e2e.yml
+# is outside the group: one cluster per run is cheap enough to overlap.
 concurrency:
   group: e2e-hypervisors
   cancel-in-progress: false
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index af89a551f..72ea33b84 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -24,27 +24,15 @@ on:
         required: false
         default: ""
 
-# Shared with e2e-nightly.yml, e2e-suites.yml and e2e-ddil.yml: every one of
-# them provisions on the same runner pools and the same hypervisors, so two in
-# flight compete for their disks and their libvirt guests. Queued rather than
-# cancelled — a run in progress is someone's result, not a stale one.
-concurrency:
-  group: e2e-hypervisors
-  cancel-in-progress: false
-
 permissions:
   contents: read
   statuses: write
-  # actions: read lets the otel-job-id action look up a job's numeric id via
-  # the Actions API — github.job is only the YAML key, no context exposes it.
   actions: read
 
 env:
   GIT_BRANCH: ${{ github.ref_name }}
   SUITES: ${{ inputs.suites || 'e2e-single e2e-multinode e2e-cert e2e-lb e2e-iam e2e-partialblock' }}
   TEST_RUN: ${{ inputs.test_run || '' }}
-  # OTLP export to the central Elastic sink (wattle). Repo variable overrides;
-  # empty string disables telemetry entirely.
   SPINIFEX_OTLP_ENDPOINT: ${{ vars.SPINIFEX_OTLP_ENDPOINT || 'http://192.168.1.13:8200' }}
   SPINIFEX_OTEL_ATTRS: ci.run_id=${{ github.run_id }},ci.workflow=${{ github.workflow }}