I think I understand your posting now - what you are saying is exactly what I mean, but it's of course only true for IDE developers. And actually, I'm not sure

I think I understand your posting now - what you are saying is exactly what I mean, but it's of course only true for IDE developers. And actually, I'm not sure if LSPs help so much. To my knowledge, IntelliJ still uses its own compiler to support the user at least partially of the code is incorrect and doesn't compile.