> something different came along and called itself "Perl 6"
You appear to forget that the "Perl 6" initiative originally came from the Perl 5 Porters. It did not just come along and called itself "Perl 6": the "Perl 6" name was used because originally it was intended as the successor of Perl 5.
That it didn't materialize in time, that it became something much different, is something that happened later. But even with Pugs around 2005, Perl 6 was still the successor to Perl 5. Only around 2010, when the sister language concept was introduced, was Perl 6 considered to be a different language.
The concept of perl 6, at some stage shifted from being the next incremental release of the Perl language, sure. For around 10 or so years the Perl 6 crew knew this was going to be a different language, yet held onto the name for this period of time and even made arguments in public that Perl 6 should remain the name, given all the facts, as recently as last year. This sort of thing can cause problems in communities, and nobody on the outside of the inner clan really cares, beyond the point that all the slight of hand and infighting pushes good folk away.
You appear to forget that the "Perl 6" initiative originally came from the Perl 5 Porters. It did not just come along and called itself "Perl 6": the "Perl 6" name was used because originally it was intended as the successor of Perl 5.
That it didn't materialize in time, that it became something much different, is something that happened later. But even with Pugs around 2005, Perl 6 was still the successor to Perl 5. Only around 2010, when the sister language concept was introduced, was Perl 6 considered to be a different language.