Comment by eecc
Poster laments the lack of a quality folding keyboard.
Well, though not in production any more, there is one that is absolutely perfect: Microsoft Universal Foldable Keyboard.
You can still find it on eBay, and it’s unfathomable — though perfectly in-character — for Microsoft to have terminated it.
What about a wearable split 34-key keyboard? That could work, for outdoor coding. Or voice interface, there was a video of a guy coding in Emacs using that.