Symfony 6.4 LTS, and choosing not to move to 7

6.4 and 7.0 shipped in the same week, which is the release model working as designed and is still a decision.

what 7.0 is:
  6.4 with the deprecated code removed. no new features.

what that means in practice:
  1  upgrade to 6.4
  2  fix every deprecation notice it emits
  3  7.0 is then a version bump

and what we did: stopped after (1).
  6.4 is LTS — supported until 2027
  the deprecation count was 140
  nothing in 7.0 was needed

Taking the long-term-support release and stopping is the right answer when nothing in the next major is wanted, and the reason to say so explicitly is that the deprecation work does not get cheaper by waiting — it gets forgotten. We logged the 140 notices with a ticket and a quarterly review rather than pretending 6.4 was a destination. The archive’s Symfony content is thin from here regardless; this is the last decision of consequence.