TBH, I own a 1968 Martin D12-20 I didn't play for so long that I loaned it to a friend 10 years ago; he plays it regularly. I saw a Taylor 12 a couple of months ago that I would definitely play if it lived with me, though.
But the reason I stopped playing the 12 was simple: too many instruments to carry on the road. And autoharp atm fulfills any desire I have for a fuller stringed sound.