The split keyboards and ortholinear keys aren't that much better. They're mostly ideas about what would be better ergonomically, but they haven't been as thoroughly thought out as they seem. For the split keyboards, look at the whole of human history and tell me, out of the hundreds of thousands of years of tool use all the way back to the stone age, how many of those tasks were done with your arms set straight out in front of you, hands 12 to 14 inches apart. I bet most of human fine movement tasks were done with the hands close together (sewing for example). The position with your hands extended and 12 inches apart actually puts your elbows in a quite uncomfortable position, and I wouldn't be surprised if that in itself would lead to some injuries in that area (elbow). As for the ortholinear key designs, that's not very ergonomic either. Make a fist with your hands. Now open your fingers. Do they open in a parallel line pattern like the orthogonal keyboards? No, they don't. They spread out, in a star-like pattern. If the keys were laid out similar to that pattern then, yes, I might concede a benefit there. But these two regular complaints about traditional keyboards while hailing split and orthogonal keybords as well thought out ergonomic solutions seem more like a fad to me. By the way, I don't think the traditional typewriter-like keyboards are great, far from it. I do think, though, that our hands are pretty resilient, but not infinitely resilient. Too much repetitive work, insufficient rest, personal biomechanics, can all eventually lead to injuries, on all these types of keyboards.

PS-> Who came up with calling it 'ortholinear'?