My biggest complaint is probably that it doesn't support overlay or popup windows, which makes it impossible to use plugins like WhichKey[0] and such, which I like on normal neovim because I'm a scrub and don't know vim hotkeys by heart
Limiting this cheatsheet to just one side of an A4 sheet kept it usable and forced me to rewrite it every so often - every next iteration leaving off all the commands I had been checking back often enough for that they had finally stuck.
Completely unsolicited, but hopefully useful advise nevertheless :)
It's the antidote to most sophisticated editors worst problem, that there's a bajillion commands scattered around a million menus, many of which are not even remotely intuitive.