Why bother with 7 cartridges? They are pretty flexible, you can totally put flash memory in it and have a multiple gigabyte large "rom". Emulators would have to be updated though.
https://www.reddit.com/r/FinalFantasy/comments/p317xa/final_...
I was thinking of JRPGS having up to 5 discs on the PlayStation, and a Final Fantasy 7 ad that said if it was put on cartridge it would cost 1200$, proclaiming FF7 would require 20 cartridges at 60$ on the N64. I was holding back