Those SLAs didn't seem to help people who bought these Jamboards. Or any of the laundry list of beloved products google has shut down over the years. They have a reputation for killing products for a reason - PMs on Stadia were promising that it definitely wouldn't be shut down just months before it was killed.
I'll grant, Google has SLAs on some of their products (like Firebase). But trust arrives on foot and leaves on horseback. Wave, Inbox, Reader, etc. I still remember - with horror - that time google suddenly announced they were massively increasing GCP (Google Apps?) pricing without warning anyone beforehand.
Is there a prediction market for the life expectancy of google products? Some things will probably be around more or less indefinitely: Docs, Gmail, etc. But the base rate for "this google product, service or API will still be available in 1 year" is probably somewhere between 1% and 10%. I'd consider any "all in" strategy on a lot of google's tech to be a serious business risk for that reason. Especially if losing that bet means you need to rearchitect your entire application.