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
Whenever I didn't know how to do something or suspected there'd be a far more efficient way to go about it, I'd look up the magic words or keys to use and write them down.
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 :)
The beauty of the whichkey/space menu is that you can both learn shortcuts AND find new ones (they're grouped by domain) AND find old shortcuts you rarely use.
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.
0: https://github.com/folke/which-key.nvim