Too many years of Vim and now vim-keyed modern editors has resulted in the Insert key going ignored on almost every keyboard I've owned.
When I built a fancy ergo keyboard, it has arrow keys, pgup/down and home/end, but Insert is one of the few that did not make the cut, along with Caps lock, Scroll lock, Printscreen and Pause.
I do feel stupid for having left off the backtick by accident. Someday I need to remember to add it to the ~ key as a layer and recompile.
I'm not denying the key has value, otherwise it wouldn't have made the 101 key standard. It just doesn't have value to me, because my fingers don't look for it. I will catch myself typing "caw" to try to Change A Word in the wrong editors.
I'm one of those nerds who wants all their shortcuts to use the alphabet keys. I use a Dactyl-Manuform and my hands rest perfectly in the dishes, I don't like reaching outside of them.