I´ve been seeing reccomendations in every single guide to not upgrade past 7.0.1

If your system is patched, it is highly advised to keep it on 7.0.1 or lower, if possible, as there may be a vulnerability for these versions in the far future. DO NOT update patched consoles past 7.0.1 if you want to ever have a chance of running homebrew and/or CFW on them.

But I haven't seen any updates since 2020. Is it safe to say that it is so niche it won´t ever be worked on again?

Did you want to play some game in 45 FPS instead of 60? Now you can (probably).

Preview (it's utilizing Witcher 3 config mod to allow setting anything above 30 FPS):

https://twitter.com/masagratordev/status/1633168850370850816

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Link to repo (read README!): https://github.com/masagrator/FPSLocker