Recently I found myself in the market for a custom keyboard, to my great surprise. Custom as not as DIY but as something different than $10 OTC or even $100 Logitech.
After the hours of watching pics I decided to just see it with my own hands and went to a shop which specialize on them.
And there I confirmed the feeling what I had before - 99% of these keyboards, despite quite advanced tech gone into them on all layers, are not usable, because they are made to stroke the ego of the owner but not for the actual work. This is especially evident by the crammed right cluster which makes typing brackets, curlies and quotes quite a pain, because the Shift key is gutted and nowhere under the right pinky.
Using something else than microUSB or Type-C (for the PC connector) is just a cherry on top.