You are right. Even today, my impression is that most CS students taking compilers and PL courses are still taught in the "batch mode compile the world" way. Mo

You are right. Even today, my impression is that most CS students taking compilers and PL courses are still taught in the "batch mode compile the world" way. Most textbooks still assume that too. It's somewhat understandable because the way you architect a compiler for an IDE is a lot more complex. It's basically everything that's hard about a compiler plus everything that's hard about data validation, and everything that's hard about caching and cache invalidation. But, yeah, there's a big gap between industry and academia with regards to how to architect an IDE/compiler.