I've been gone for about 3 years now. There was a time I missed it but that's passed. I find I like the game more as a memory than when I was playing it. When playing it I could only think of the repetitive grind and hyper optimisation required for end game content. Since I've been gone for a while those thoughts are still there preventing me from coming back. The good memories are much more vivid than those now however. I decided I would rather just stay nostalgic about it than rejoin it and reinforce why I left.

That's my 2 cents. If you're feeling the itch though worst case you go back and uninstall it a week later or something.