[PopsiclePete]

What happens? You become the most-widely used language on the planet? The Python 2-3 wars are over. Python 3 won.

[pjmlp]

I just installed Python 2.7 on my new project because some critical libraries used by the customer don't care Python 3 exists.

[xxpor]

Open source ones?

[tsimionescu]

You get 10 years of headaches for everyone who gets close to the language. Even today, the python executable in Ubuntu is called `python3`, not `python`.

To be fair though, it would be less of a problem for C++ than it was for Python, since you wouldn't have to depend on the compiler from the end-user system.