What level of support is being guaranteed to the drivers that upstream has stopped supporting? If a bug crops up, does AlmaLinux intend to patch things in-house?
Disclaimer: I volunteer my time at AlmaLinux/am part of the project.
I don't think there would be any guarantees, as it is a free product. So, it would be based on things like the availability of patches upstream (kernel.org), and how many people need the fix, as well as how much effort you are contributing to the fix (be it testing, willing to replicate the issue, etc...)
So to be certain, using these drivers in subsequent releases should be done with caution.
Are there any plans to add testing for these specific drivers/hardware?
If people donate hardware - probably yes.
If people with such hardware would be willing to run tests, then probably yes.
Otherwise - my guess would be no, no specific testing for such drivers would be made.
It's worth noting that the drivers are still in the mainline Linux kernel and many other distros. If they have a problem it's not just Alma vs the world to figure out the issues - it will be Alma plus the world working on the solution.
Guaranteed stability, robust performance, and extensive support!
The only comment on this post that isn't from an affiliate is from an account created within an hour of the post. Very on-brand.
Adding back support for the older hardware is really a nice touch here.