Google cancels products so frequently that no matter now cool it may seem I rarely even bother checking them out - I can't stand becoming reliant and then having the rug pulled out from under me
GCP does deprecate products (former App Engine PM here, deprecated many APIs), but it's definitely less frequent than the "Google deprecates everything" memers want you to believe, and there's a minimum 12 month deprecation period before literally anything is deprecated.
https://killedbygoogle.com/
Honestly the list hilariously long!