I got a Ti 456 and realised it was not the bike for me when the NDS rear dropout detached from the rest of the frame.
I also built up my old XC hardtail frame as a rigid “to tow the trailer with kids in”, did about 20 miles on it over the course of a year (thanks to Strava I knew this and had to face the facts) so spend a couple of hundred mildly improving it and chucked some suspension forks on it. Still hardly gets used but it’s now a keeper, good for long not too technical rides and any XC races I’m silly enough to do (although it could do with a lighter set of forks, and 29in wheels, and….)
And I have a SS inbred that used to be my go to bike for local rides, but since I moved house I’ve hardly used it. It’s now in the process of being broken to sell/cannibalised for parts. Not a huge amount wrong with it, just didn’t suit the new local trails (or getting to my old local trails ~10 miles away).