> Language Server Protocol is created by Microsoft, RedHat and Codenvy, which provides language features (e.g. completion, navigation, formatting, and so on) through JSON-based RPC protocol... I'm missing out on this. Is it on par (at least potentially - in terms of what it enables you to implement) with JetBrains IDEs and ReSharper already?
IDEA is hyper optimized for their target languages, from what I know Intellij builds custom engines for every language, so at least in some aspects (large scale refactoring) and at least for now, IDEA and its siblings are a step ahead.
But for 90%ile tasks, LSP is good enough.