Upcoming Qt will feature native support for multiple controllers + remapping for all relevant OSes. This makes the step a bit easier.
Rationale:
Windows has cleaner code (becoming just like OnePad) and no more DS4/DualSense/Switch Pro/... wrapper such as steam or DS4Windows (ryochan7) though will still work if you want it.
Linux will have OnePad legacy remapping.
Mac will have feature parity to some extent.