Perl 6? They even changed the name to Raku 19 years after its design started probably to avoid any Python 3 bullshit.2. Can you name another high-level language that broke backward compatibility the way Python 3 did and created a similar schism in its community?
Indeed, Perl designers made the same mistake at least twice and in effect destroyed the most popular website backend language of the 90s. Perl never recovered from backward incompatible changes and is now a dead language.
Python designers are on the same trajectory.