I had to vacate the basement for the last week and a half or so because it's not worth paying the electricity to heat the basement in single-digit weather. So, I've been typing directly on the laptop keyboard (with a wrist brace), often on the couch.
My back is fine (though I do use supportive pillows), and I thought my hands were holding up well. My wrists finally starting hurting today, so I hauled the desk and ergonomic split keyboard up to my bedroom, rather than wait for any escalation.
Still, that run was a lot more than I could have expected from my wrists a few years ago!