Certainly not going to shift my team or multiple teams onto it if I can't trust it's going to be there tomorrow.
Users: Hey Google, please commit to supporting your new shiny product for the long-haul!
Stalemate. Google did this to themselves.
That's winning an early customer, that's proving product/market fit, that's progress. That's why Google would do this.
The marketing material pitches it as a much bigger deal, but then would anyone sign up if it didn't? There's a minimum quality bar that many people expect before signing up, and from a known entity like Google that's likely a much higher bar.
I almost wonder if they're making problems for themselves by naming it under the Google brand? Being completely separate they'd be able to fail faster, ship something lower quality that still proved product/market fit, etc. Area 120 seems to be their attempt to create this space, but I'm undecided on how well I think it will work.
Unless you're a Google competitor there's likely no reason to exclude Google products.
Given this is explicitly being launched under "Area 120", "Google's workshop for experimental products", I think it's fair to let them ship things, try things out, see what works, and close what doesn't.