raccoondad
The issue isn't GOS ceasing to exist, it is GOS ceasing to be useful/relevant outside of a handful of edge cases.
Google is pushing the Play Integrity API hard and is reasonably likely to make it a requirement to be listed on the Play Store in the relatively near future.
By selling it as an easy to use, easy to integrate, essentially seamless security option they are getting everyone who has legal or PR reasons to care about app security to include it. Governments are integrating it with their own apps that are de facto required to be in their nation. Many banks are doing the same.
Right now, today, recommending GOS as a daily driver to the average Android user is a nonstarter simply because of the not insignificant chance that critical apps they rely on daily simply won't work tomorrow.
Honestly, someone needs to create an open source, non profit foundation that releases code that can be dropped right into an app to use the hardware attestation API and check against known secure signatures. With clear criteria for inclusion on the "known good" list. Then, once you have that, push it as a Play Integrity alternative. But then it has been over a decade at this point and no one has bothered to make a decent Play Store competitor so I hold out little hope.