http://www.modernperlbooks.com/mt/2013/02/goodnight-parrot.html
parrot gives up on supporting languages other than Perl6 Rakudo's NQP:
http://reparrot.blogspot.com/2013/02/its-been-quiet_15.html
" NV: In a previous interview, Moritz Lenz shared with us that Parrot’s main mistake was that instead of focusing on satisfying Rakudo’s needs, it aimed to become a general platform for dynamic languages, something that ultimately made life hard for the Rakudo implementers. "
http://stackoverflow.com/questions/5328295/llvm-parrot-jvm-pypy-python?rq=1
http://www.modernperlbooks.com/mt/2012/12/the-implementation-of-perl-5-versus-perl-6.html