I've used React since it became available and the editor is still pretty slow, to be honest. Can't imagine using it with the option enabled. Honestly, Sublime Text is great, I've purchased a license, but the speed of development will kill it. Every day I "Check Update" and I get disappointed. Not that it needs that much new stuff, but still. You don't feel the heartbeat, if you see what I mean. One great feature of Sublime that I miss in Atom is persisting unsaved changes between restarts, which I abused for temporary To Do lists and stuff.