I don't know your viewpoints, so this isn't mean to refer to you specifically, but it might also be that one is attached to the GPL3 and doesn't like seeing it

I don't know your viewpoints, so this isn't mean to refer to you specifically, but it might also be that one is attached to the GPL3 and doesn't like seeing it criticized. At the least, it has been my experience that many GPL advocates do not appreciate critical discussion of the effects of the license and the viability of less restrictive alternatives. Two of the top technology companies (if not THE top two), Apple and Google, are backing Clang/LLVM development for their technologies after having been dependent on GCC for a number of years. There must be a reason for that worth discussing.