Topic: Confused about Apple/RME UFX and updates

I have a iMacPro (running Big Sur) and am currently using (happily) my UFX connected via Firewire through a Apple 27” monitor. I am confused about whether I must (or should) update the UFX drivers (or change to USB) if I decide to go to Monterey. I would greatly appreciate comments and advice about possible pitfalls and possible benefits, particularly if I was to daisy chain a FF800 by Firewire or would I be limited to Doing that by ADAT?