exFAT is great because similar to its predecessor FAT it has read-write compatibility with Linux, Windows, and macOS. But while FAT can only have files as big as 4 GB and partitions of 16 TB, exFAT can do 16 EB for files and 64 ZB for partitions. Lots more room to grow.
It’ll be a slow process since I can only format one drive at a time and need to copy the data to another drive and back again. So far I’ve converted 4 TB of data.