As long as nothing comes around that is bigger than Resident Evil: Revelations in terms of blocks, I'd say a massive amount. So far on my card I have
Resident Evil: Revelations Luigi's Mansion Monster Hunter 3 U Zelda: OoT NSMB 2 Fire Emblem Castlevania
about 7 or so eShop games about 8 or so NES games about 13 or so GB/GBC/GG games
and I've barely put a dent in the total blocks of my 32gb card. I'd say a 32gb card should last a long, long time when it comes to 3DS games if all the future titles end up staying around the size range current games are at.
http://www.youtube.com/watch?v=-fx4HYOunLc&feature=plcp 3DS FC - 3007-8283-2971
I have 10 retails (including Revelations), about 20 random eShop/VC games, a few demos and netflix on my XL. With all of that I only am using up 9gb on my card. You'll be good for a long while with 32gb.
3DS: 5413-0316-8554 (PM if you add me, adults only) o(^^o) (o^^)o
A 32GB card will last the average 3DS user through the system's lifecycle.
I agree with this. I think you'd need to be a wild player in order for it to fill up, especially considering that you can just uninstall some of the games after you've played them and reinstall them whenever you feel like it.