Worse than that. Its AppEngine Standard vs AppEngine Flex vs Cloud Functions vs Cloud Run vs KNative (Cloud Run, but different).
Oh and if you used AppEngine Standard, you can't move to Flex as Flex came with a whole new set of libraries. And Flex to CloudRun didn't exactly have a seamless migration.
Along the way they changed multiple internals with deprecation causing code base changes. Such-as Memecache, ImageAPI, Monitoring price changes.
I can't imagine any enterprise who's used the ecosystem continuing. The sheer number of architecture impacting changes leads to huge operational overhead costs to maintain applications running on this infrastructure.
Oh and if you used AppEngine Standard, you can't move to Flex as Flex came with a whole new set of libraries. And Flex to CloudRun didn't exactly have a seamless migration.
Along the way they changed multiple internals with deprecation causing code base changes. Such-as Memecache, ImageAPI, Monitoring price changes.
I can't imagine any enterprise who's used the ecosystem continuing. The sheer number of architecture impacting changes leads to huge operational overhead costs to maintain applications running on this infrastructure.