I prefer ShortCat's model:
Similar to Vimium, but for the whole OS. Apparently Homerow is similar, judging from comments I'm seeing here.
I really wish I knew an equivalent for Linux. I might even leave Gnome behind if a different DE has a good model for this.
ShortCat has a beautiful slogan:
"Manipulate macOS masterfully, minus the mouse."
I used to use (and love) ShortCat, but it got too slow on my ancient MacBook Pro. I switched to Mouseless, and I actually prefer it now.
This is purrrfect ;)
I've been looking for something like this
I like shortcat, but it's slow, even on a modern Mac.
Also, I'm not sure the dynamic nature of the hotkeys is a good thing. I could imagine if you use Mouseless for a long period of time, muscle memory might prevail as screen locations map to the same set of keys.