Apple reserves fn?

I read that fn should be reserved for system apps. Does this mean BTT will not be able to treat fn as a "modifier" in the future? So no more BTT shortcuts with fn?

https://mjtsai.com/blog/2023/05/02/fn-key-reserved-for-system-applications/

This does not affect BTT because BTT doesn't use the Apple Keyboard Shortcuts system (but we never know what Apple will do to break things in the future).

Good to know, thank you.