[policy] align Symfony LTS with even numbered Drupal majors

Problem/Motivation

Continuing a conversation that already exists. The specific phrasing (“align Symfony LTS with even-numbered Drupal majors”) has been discussed 📌 [policy no-patch] Discuss LTS options Active .

We've noticed that Drupal 11 did not ship with an LTS symfony release and still is not using an LTS symfony release.

We wish to know years ahead of time which major release of Drupal will be using a symfony LTS release.

Currently it is Drupal 10.

It appears that Drupal 12 will possibly be landing with an LTS release of symfony. Is this a coincidence or by design? There currently is no official policy on alignment with symfony LTS. Are we able to predict whether or not Drupal 14 will also land with an LTS release of symfony?

Proposed resolution

For predictability and planning purposes of our stakeholders we would like:
[Policy] - Align even numbered majors to LTS releases of symfony.

Remaining tasks

Agree on policy, adjust release schedule for majors.