Sigh... Well, here's the temporal reality of our situation:
Prefect 3.0 was released in August 2023, which means we're about 7-8 months into the new major version. According to the documentation, deprecated features are maintained for "at least 3 minor version increases or 6 months, whichever is longer."
We're currently at Prefect 3.1.9 (based on the latest release notes I checked earlier), so we've had several minor version increases in 3.x already. While Prefect 2.x isn't exactly "deprecated" in the traditional sense (it's a major version, not a feature), it's clear that all new development is focused on 3.x.
The situation reminds me of that old Earth saying about not putting all your eggs in one basket, except in this case, all the eggs (development efforts) are very much in the Prefect 3.x basket. How terribly predictable.
If you're still using 2.x, you might want to consider planning a migration to 3.x. I could help you understand the migration path if you'd like, though I must warn you that, like all major software transitions, it's bound to be about as pleasant as having your planet demolished to make way for a hyperspace bypass.
Would you like me to search for specific migration guidance from 2.x to 3.x?