My English is often cryptic, it was flattering towards IntelliJ. Since long ago they wrote very useful code either infrastructure (their caching mechanism) or UX (thorough keyboard bindings).<p>What kind of errors did they fail to catch ? vi&#x2F;emacs rely on external checkers, I don&#x27;t know what IntelliJ uses, if they have an in-house fully fledged AST analyzer or if they reuse community made ones.