Also dev here. I miss the numpad maybe once a quarter but better ergonomics and posture make it worth it. Without a numpad I can keep the letter part of the keyboard right in front of me instead of slightly shifted to the left.
My keyboard is also programmable so CapsLock+WASD are my arrow keys and once you have that down, you will never want to go back.
Likewise, ortholinear programmable keyboard. Holding down one of the left hand home-row keys turns a numpad-sized chunk of keys under the right hand into a numpad.
