Reportedly, LLVM, while initially successful, has severely slowed down its development lately, with many historical contributing companies having abandoned LLVM in order to focus on their own company-specific languages. So LLVM may no longer be the beacon of permissive licensing that it once seemed to be.
Afaik the only notable departure has been Google for Carbon, but afaik even they use llvm as the backend. I believe the only negative consequence has been to clang not llvm itself.
I seem to recall seeing mentions elsewhere, but this was all I could find. However, as I don’t have any first-hand knowledge myself, I’ll gladly yield to your superior experience.
