I understand, I've used a 40% layout (Poker II) and I liked the keyfeel and portability. I did like typing on it way more than using my laptop's keyboard. I liked everything about it except the fact that I ended up trying to use the arrow or function keys or numpad all the time for things like I used to with my larger keyboards (gamedev), get tired of mispressing them over and over, and end up going back to a full layout keyboard. (I'm typing this on a Filco Majestouch.) If I'm understanding the links correctly the Atreus doesn't even have a number row, which at least the Poker had.

Maybe I just haven't fully internalized the "you'll get used to it after some time" part yet. Maybe the "some time" part is actually around six months of continuous usage instead of about three. I'm not sure.