It’s possible but Logic experts all seem to say the difficulties of maintaining it working are too much. I seem to recall a thread on SOS’s Mac forum about it recently [within the last 6 months I think].
27" iMac Pro 1.1 8 core 64 GB 1 Tb SSD with 27" Apple Thunderbolt display
MacOS Catalina 10.15.7, Logic X 10.6.1
4 TB G-RAID via Thunderbolt Display and 4 TB TBolt HDD Timemachine only,
RME UFX via Firewire to Thunderbolt Display,
MOTU MIDI express XT to USB, Seaboard 25 via BT or USB,
Roland AT45, Kurzweil PC3X, Arturia MatrixBrute, 12Step & BCF2000 via MOTU’s MIDI
PC3X, MatrixBrute, 12Step and BCF2000 occasionally via USB.