I've got this game on PS4 and PC. Probably dumped over 1,000 hours in it. Generally, I would NOT want a physical copy, if just because this is the perfect "jump in an play 2 matches for 15 minutes".
That said, this is good for collectors who want to have a physical copy for any game on a system, or those who are trying to limit digital purchases given how little storage space there is on the Switch.