When I use Teams I have to pretty much close every other open app I have; then I use Teams; then I close Teams and go back to work. If I don’t do this my keystrokes lag by about 2 seconds.
My computer isn’t even that old, it’s from 2016.
Personally I think it would be a tragedy for macOS users if Omni went non native but I suspect we’re going to see more native software in the future not less.