LUKS encrypts the whole drive, native FS encryption can encrypt it partially (e.g. just the home partition). Additionally, decrypting without a keyboard is a pain or impossible (e.g. touch screen only devices).

Still no built-in encryption support :(

All the parts you quoted make it non-free. Free software allows you to use and modify it for any purpose.

So proprietary

To this day, I still don’t know how to set a path variable permanently in any Linux distro

KDE Connect works on Wayland and can do all of that. Should definitely be technically possible.