@nyamsprod Nah, you're good.
PHP itself doesn't consider adding a deprecation a BC Break but something applications need to be able to handle sanely.
@nyamsprod yes, you're correct. But lots of the community still handles it as an error, I think due to it being also handled by the error handler (and PHP defaults to treating it like an error IIRC?).
Wrote a blogpost a while ago with the same intention as your comment: https://wouterj.nl/2021/11/deprecations-are-not-errors

Every now and then, there seems to be a lot of fuss in the PHP community about deprecations. In these discussions, deprecations are often discussed as if they are fatal errors. I think that is very wrong. Let’s reduce our expectations of deprecations. It’ll make everyones live much less stressful.