I recently was gifted -- very, very generously! -- a Moonlander Mark I split, ortholinear keyboard [0] (made by the same company that previously made the Ergodox). It's genuinely fantastic, and I can't ever see myself going back to either a non-split or a non-ortholinear board as my desktop's input. It's a huge improvement ergonomically -- (0) no hunched shoulders, with the halves at shoulder width (1) the ortholinea…
> It's a huge improvement ergonomically But what if you need to use a mouse? Then what I've found best ergonomically is to use a "rollermouse". But I don't feel that works well with a split keyboard, and then I prioritize the mouse. (For me my elbow is the biggest issue)
I have personally switched to a tiling window manager that allows me to do much with the keyboard, added the surfingkeys plugin to chrome to allow the same when browsing and switched to using the neo2 keyboard layout (this is for Germans, Dvorak or something similar might be better for you).
The combination of these factors has massively improved how much I need to reach for the mouse throughout the day.