It makes a lot of sense to me, although I haven't jumped on one yet.
But I refuse to use anything but a 65%, I have a seperate numpad if I need one and having mouse and keyboard closer together is already a godsend ergonomics wise, I have no idea how I could stand full size boards back in the day.
A split keyboard is already great because your arms can be in a normal position and proper tenting and tilt makes sure your wrists are at a good angle as well.
That said, most of the more "advanced" split keyboards have pretty.. unique layouts and I don't know if I'll get used to them. I also really want to keep my arrow keys and don't want to rely on layers too much, for stuff like the F keys and other rarely used functions it's fine but I don't want layers for anything that's a regular part of my workflow.
Maybe I'll just get a quefrency and see how it goes.
This is just blatant "fuck your concerns it will blow over anyway".