Maybe, but at the same time it seems like the best option for general language support in emacs.

A lot of languages have working lsp implementations (at least according to https://langserver.org/) and, assuming it will stick around, this means that emacs can get all of these nice features "for free" by having an lsp implementation. This is a much safer bet than just assuming that somebody will provide and maintain emacs plugins for <insert language x here> that provide everything that lsp would.