Indefinitely, not endlessly. You cannot predict the date when your project is going to be sunsetted: it may be in 6 month, or may be well past your retirement.
What's that software engineering truth? All the "temporary" code ends up running in production for decades? :D
I think GP was thinking more of https://killedbygoogle.com/, Google is somewhat infamous for killing off well-liked projects if they are not successful enough.
Yeah, I think we're all aware of this tired old joke by now.
So google wants to kill off the tired old joke now huh!