I played the piano when I grew up, same-hand chording is second nature to me. It's all about wrist movement though, never strain your phalanges. I same-hand cho

I played the piano when I grew up, same-hand chording is second nature to me. It's all about wrist movement though, never strain your phalanges. I same-hand chord most close combinations: Ctrl-W is 5-3, Ctrl-C is 5-2, Alt-W is 3-1, as is Alt-P on the right-hand side. But I use two-hand combinations for almost everything else because the right-hand Ctrl and both Shift keys aren't easy to reach with opened fingers. The Ctrl key on the left is only easy to reach for me because I touch it with the side of my hand, not the tip of my pinky. I have looked at ergonomic keyboards before, and have the same reservations about the number of keys as you. I use the numpad a lot for data entry, and my previous favourite keyboard was a Logitech one that had an additional row above the numpad that contained keys for parentheses (without using shift), an equals sign and a second backspace key. I did seriously consider the Maltron L90 full-width keyboard, but I couldn't source it locally and the price was too steep for me to buy without testing it first. Having something like that keyboard coupled with a programmable (QMK) controller would be an option I'd seriously consider though, even without a separate numpad.