When I RDP’d into my NAS this morning, 21H1 was queued and ready for download and installation, which is happening as I type this.
After the upgrade, I’ll have to go through and rip out the “Special” folders and Quick Access, but I’m not expecting any problem with my drive numbering, since Drive 0 is on an mSATA, and Drive 1 is a RAID 10 array managed by the motherboard and not the OS. I’ll soon see.