It looks way better than TeamViewer or AnyDesk, just like it would be local (similar to how RemoteDektop looks). Of course it can begin to stutter when watching videos ect but everything else is fine.

It can also stream 4K@60fps without quality loss or latency no problem

Sounds like a DB problem. I had to re-create mine earlier this year because it got corrupted somehow, probably through updates. Some actions spawned hundreds of DB workers and the CPU would be stuck at 100%