[Blikkentrekker]

> The Python developers chose to sacrifice backwards compatibility.

And it is quite clear that that choice was not based on accurate estimates and insights.

The original e.o.l. was laughably short and then had to be doubled. It was quite clear they based their choice on the assumption that consumers would have all switched to e at a time when 2 was still used by 80%.

They made that choice based on what can only be seen as complete ignorance of the cost of rewriting software.

Right now, the biggest reason to drop Python 2 for most serious consumers is not any of the improvements that Python 3 brings, but that it is e.o.l..