It's definitely a new start, but both Perl 5 and Perl 6 each have various modules bridging the gap between the two. Yeah, they're definitely separate languages, but (at least in theory) they're very much interoperable.
I don't know much about the Python ecosystem, but my impression is that besides the 2to3 program there wasn't really much of an effort to make them work together.
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The fracture is very slowly healing. Outside of some huge corporate hold outs with a lot of Python 2 code (Google & co.), Python 3 will win out.
Perl 6 vs Perl 5, on the other hand, I don't even know if you can call it a fracture. A new start would be more fitting.
It's definitely a new start, but both Perl 5 and Perl 6 each have various modules bridging the gap between the two. Yeah, they're definitely separate languages, but (at least in theory) they're very much interoperable.
I don't know much about the Python ecosystem, but my impression is that besides the 2to3 program there wasn't really much of an effort to make them work together.