To my knowledge, only 2 implementations were ever in development simultaneously: Niecza and Rakudo. Niecza focused on producing a Perl 6 on the .Net infrastruc

To my knowledge, only 2 implementations were ever in development simultaneously: Niecza and Rakudo. Niecza focused on producing a Perl 6 on the .Net infrastructure. Rakudo is based on NQP (Not Quite Perl) and initially ran on Parrot, then also added the JVM as a backend, and then later added MoarVM as a backend. Niecza sadly stopped being developed as its main developer developer decided it wouldn't be able to come to a full release (around 2012/2013). So to say that "about 3 implemetations of Perl6 in development simultaneously" is incorrect, and then to name MoarVM, JVM and Rakudo as the three is even more incorrect. Perl 6 got renamed to Raku in 2019. Since the first release in December 2015, it has become about two orders of magnitude faster. You can check out the Rakudo Weekly News should you wish to stay up-to-date on developments in the Rakudo world: https://rakudoweekly.blog https://rakudoweekly.blog