You can pretty much ignore Lua and still use neovim, but I see your point. Lua is a big part of the appeal of neovim to me, and I'd probably have stuck to Vim without it. (Another big part is its embeddability - I can have a real neovim instance processing my commands from VS Code when I need to use that).

I agree with you about treesitter too: it's not really better than the old regex way in terms of (non-)bugginess in my experience, and I've been hearing more and more reports of it being much slower than it's claimed to be.