As someone who uses a 40s keyboard (no numbers row, kinda similar to the bottom middle keyboard in OP's pic): my wrist pain that I got from typing 4-6 hours a day was gone once I started using them, because they're compact and I don't have to move my hands/wrists at all. When I type with a full-sized keyboard, I have to move my wrist when I want to type numbers, for example. Now I can type for 8+ hours a day without worrying about pain.

Of course, keyboards are all personal preference! That's why I love the mech keyboard community, seeing all the different layouts and shapes people tailor to use for themselves.