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.