I have MBP with displaylink. Just did a fresh install of Big Sur on a new SSD. Keyboard input is very laggy. Sometimes works fine. Sometimes it's awful. I had been using displaylink with same USB3 unit and same MBP for years with other versions of MacOS and it was just fine. This is not usable. Going to downgrade to Catalina.
I have MBP with displaylink. Just did a fresh install of Big Sur on a new SSD. Keyboard input is very laggy. Sometimes works fine. Sometimes it's awful. I had been using displaylink with same USB3 unit and same MBP for years with other versions of MacOS and it was just fine. This is not usable. Going to downgrade to Catalina.