If you're trying to get people to try your new editor, no matter how awesome the ideas that you're trying, you're going to lose a chunk of your audience if it d

If you're trying to get people to try your new editor, no matter how awesome the ideas that you're trying, you're going to lose a chunk of your audience if it doesn't support C syntax highlighting, a chunk if it doesn't support Python intellisense, and so on and so forth. You can have the best idea in the world, but people will play with it, and decide that they love it but can't use it for "real work" unless you slog through adding native support for a bunch of languages and runtimes/compiler suites. That's a huge burden. Now, if you implement LSP, you get "for free" support for C#, C, Python, Rust, etc etc. People can evaluate your editor on its merits as a text editor, not on whether you had the time and energy to add support for their favourite language.