I don’t even know how those play into LSP as I don’t use nvim. There is a great LSP for vim9 that isn’t hard to configure (it could be simpler but it’s just a copy/paste) but it’s more like you said which is integrating it with my ingrained workflow. All I really care about from LSP is rock-solid jump to definition and I have yet to work on project big enough (in the era of LSP) where tags aren’t sufficient (and even just having the runtime path configured properly makes gf enough in a lot of cases) soooo I see little point adding more daemons onto the pile unless totally necessary. Also, aren’t we just gonna have computers write our code for us now? Do we even need editors at all? 
(sorry getting off-topic)