I have to admit that while I was and am a die-hard SF fan, attending cons whenever I can, and reading, reading, reading, I've never been a "trekker," per se. I know enough, at least, not to say "trekkie," but not much more about the fandom of Star Trek. For that reason, I never had any opportunity to get to know Jimmy Doohan, the man.
If I'm wrong, and there's something after this life, than I hope he's enjoying it. If nothing else, at least, his suffering from Alzheimer's is at an end.