[jcelerier]

> If I edit a file and change the name of the function, the call sites should all light up with red squiggles. In a statically compiled language. Without requiring a recompile.

which is what all IDE support ? most even allow you to automatically fix it nowadays

[alkonaut]

Well it requires quite a bit from the compiler/language server infrastructure to not just behave like a batch compiler and give up after e.g. a failed parse. The ability to analyze incomplete or incorrectly parsing syntax is very tricky compared to doing it in sequence parse -> analyze etc.

Many IDE's manage this but far from all languages (compilers) do, simply because their compilers are simple batch compilers.