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It's much more comfortable imho. You can reach all buttons without moving the hands all over the place, arrow keys are directly under my fingers at all times. It's not faster if you meant that with "efficient", but it certainly makes standard keyboards feel cumbersome to use. On the other hand more keys everywhere don't make you more efficient either, they just increase the chance of you messing up a hand movement wh…
For me, it’s the confidence of knowing you’re hitting the right key. Memorizing how your layers are configured is nbd (it quickly become second nature). 42 keys (CRKBD?) allows you to confidently strike each key and confidently return to home. I’ve never been able to guarantee this if a single key is even 2 units away from home. That being said, I think the most important thing is that you like what you’re using. If…
Ymmv; I have difficulty remembering the chords for keys I use once a week or once a month.