I have an SS-specific Salsa Selma frame that I got from the classifieds on here, but really it was a process of mechanical evolution, borne of other moving parts breaking down.
Forks packed up. Got some carbon rigids in the meantime while they were away getting serviced. Liked them so much that the suspension forks never went back on.
Alfine 8 hub packed up. Bought a cheap wheel and some SS spacers as a meantime thing while Alfine hub was being serviced pronounced dead by the bike shop. After a little experimentation with gear ratios, found a combo I liked and never looked back.
Had one puncture too many and went tubeless.
If I keep paring the bike down at this rate I’m going to end up riding a fixed-wheel unicycle.
Whilst the Isle of Wight is hilly, none of the climbs are that long, amd most of my riding is fairly gnar-free XC. I find there’s maybe only 1% of any ride where I miss having either gears or suspension. Also enjoy bombing past people on climbs where you can hear them crunching and munching their way through a series of problematic gloop-infested gear changes when the trails turn to porridge.