>>3899057High capacity is more for the fact that you can use 1 SD card for years and never need a second card.
Of course, if you use something like an A7RIV, fp L, R5, Z7II, 5DS, S1R or the like, you'll need a high capacity SD card to not constantly run out of space while on some kind of assignment, trip, photowalk, studio work, etc. etc. etc.
Any time I'm out of the house with a film camera, I usually carry a second roll of film with me just in case I need to reload, not that I always do so, but it's handy to know that I can keep shooting. Of course, this usually means I have to think about film stocks too. Going from Ilford HP4+ to Lomography Purple is a bit of a change of style of shot.