I know Unity claim they can apply their new pricing to old versions anyway, but setting that aside, how practical is it to simply stay on Unity 2022 LTSB or earlier?

I'm not a software developer, I'm a CAD modeller. My company pays Autodesk a substantial amount of money every year for licence tokens which grants us access to new releases, but using the latest is pretty much unheard of.

For AutoCAD, 2022 is the default (2024 is current) although they don't seem to have added much of interest since v2019. For the likes of Civil 3D and Revit there are useful updates in newer versions, but the version used is locked in at the start of a project, and upgrading mid scheme is only done in exceptional circumstances.

If Autodesk came out with some kind of scheme in their 2025 tos that said "if you model a bridge in Revit, we will charge 5 cents for every car that crosses or passes under it" then we could easily stick on 2024 for a decade, more than enough time to skill up on the alternatives.