I don't get it either. Most of the custom mechanical keyboard market seems to focus on 60% keyboards, but personally I use keys beyond that set. The reasoning I read on the internet is that customizable keyboards let you choose the keys you actually need... But I've done a lot of thinking, I need keys beyond 60% all the time.
My suspicion is that the market for TKL keyboards or even full keyboards is already served by the big brands so the custom vendors have a harder time.
My suspicion is that the market for TKL keyboards or even full keyboards is already served by the big brands so the custom vendors have a harder time.