[shadowmint]

See, when they invented new web browsers, the old websites still worked on them!

...and therein lies the difference.

[SEMW]

> See, when they invented new web browsers, the old websites still worked on them!

Yeah. But only because they rendered the old websites in various quirks modes[1] that emulated the rendering engines of the old web browsers.

Thankfully, web browser developers did not share the analagous mindset to the people saying 'lets stick with python2-compatible semantics forever', or we'd still be writing sites that had to be backwards-compatible with IE6, instead of having the option to specify a modern doctype and use IE6-incompatible markup (the analogy to using a python3 shebang line and writing python2-incompatible code).

[1] https://en.wikipedia.org/wiki/Quirks_mode

[shadowmint]

Whatever. You're splitting hairs.

The sites worked. Quirks mode is now being phased out, but it served its purpose. The analogy Im making is obvious:

Python 3 should have run python 2 code and slowly rolled old semantics into depreciation; this whole mess could never have existed.

Its not as simple as 'just port your code and run python3'

[rm445]

Er, not all of them, that's why the old browsers were still used.