The goal always was to refactor rustc to make compiler-based LSP feasible. The idea of original RLS, "we'll just use the compiler", is fundamentally sound. It's

The goal always was to refactor rustc to make compiler-based LSP feasible. The idea of original RLS, "we'll just use the compiler", is fundamentally sound. It's just that you'll need to turn the compiler sideways to achieve that, which is a hard work to motivate without having a real example demonstrating the benefits (or having political clout in the project to just mandate that ^^)