You can serve Fable from a cloud vendor (like AWS, Azure). They have frozen versions of the models, so likely this should not be an issue?

I would do a test to verify my suspicions.

Sounds like a good smoke test.

I’m actually so far removed from this tech that I couldn’t run such a test myself lol

In my experience, the API versions are as good as ever; it's the subscriptions that are severely degraded.