ExFAT can be problematic due to corruption. I used to have an external HDD formatted to ExFAT plugged in on my raspberry pi. When crashes occured whilst having torrent open, the disk never fully recovered. I had to constantly run repairs.
For small drives e.g. USB sticks ExFAT is great but for larger drives I'd stay away from ExFAT.
My own anecdota: I haven't experienced this ever with exFat on 20+ USB Flash/HDD drives and I regularly experience crashing Raspberry Pi's (Raspbian OS) and various flavors of Windows.
For small drives e.g. USB sticks ExFAT is great but for larger drives I'd stay away from ExFAT.