Sorry, I'm not sure I understand this point. Why would I need a different license for this from scratch implementation? What if I want Apache 2.0 as well?

Also, I'm convinced that many many people do have interest in this. Many people were interested in GCC existing in parallel with whatever other compilers were available. Heck, Chris Lattner's Clang wouldn't exist if C and C++ were "protected with patents from patent trolls". Are you saying that all these alternative compilers were a total waste of time?