I wouldn't go all digital in a million years. I only buy digital now when no other option is available. I want physical media as it gives me control. I could save everything on a hard drive but what if it fails? So all my games are gone like that? And before you say "Nintendo would let me re-download them", no, Nintendo will not let re-download them 20 years from now. I'm looking long term, like how my copy of Super Mario World still works. I don't need any service from Nintendo to run it that they could discontinue at some point.
Right now the only way for me to lose a large chunk of my games is if my house caught fire. Depending on hard drives or SD cards (unless I buy one per game, but that seems ridiculously expensive) or on some service from Nintendo increases the risk of me losing my games some day.
There is a lot of convenience in just downloading the game. I get that. It all depends on your priorities. And I have noticed it's typically us older farts that value physical copies because thoughout most of our lives we knew of nothing but.