Is this any different from vim's easy mode? I remember that being available as an extra shortcut by default when I tried gvim on windows (> 15 years ago).
It's in the same spirit certainly, but it's just not complete. For example its interaction with other plugins means you get thrown back into normal mode a lot. Also I just think the name "easy" betrays its real intention as some sort of training wheels for newbies. I'm more interested in making non-modal editing a first class citizen.
Easy mode, aka 'evim': https://vonheikemen.github.io/devlog/tools/vim-easy-mode/