The biggest issue with clangd (and a derivate like this) is that it is at least three orders of magnitude slower than non-clang based indexers like the old ones in Eclipse and Qt Creator. It used to be that I could index a huge codebase in a couple minutes; clangd takes days and therefore we have to trouble with stuff such as remote indices. Frankly, I'd trade anything in the world for a fast indexer that is NOT based on clang, even if it were not perfect (which is kind of the point).