Anecdotal: I was getting soreness in my finger joints, and about that time went to a presentation talking about repetitive motion causing arthritis for a lot of typists. It was pretty grisly. Padding in finger joints wears down, and little chips of bone start breaking off, causing pain from bone chips and realignment of fingers to fit the new bone faces. Padding restores with rest, so it helps a lot to catch it early.

I bought a couple nice mechanical keyboards with Cherry switches (red and brown). I type very lightly on them, seldom bottoming out the keys. Finger troubles went away.