That's true, but I'm not going to order a 4GB sd card if I have a spare 64GB on hand.
That is not what he is saying. You can use 32GB cards and below as exfat or 64gb and above as fat32 without the update. FAT32 has a max size of 4GB per file. Homebrew would be fine without that in most cases. The only issue would be video files or perhaps any emulator that uses full ISOs of DVD size.