Certainly with Python being one of the top languages in the wold today, the pressure to support backwards compatibility is much higher than it was back in 2007.
We are in the very infancy of computer programming. Computers will likely be around for centuries, maybe even thousands of years. The best time to remove historical baggage and get everyone to switch was 10 years ago, the second best is now. IPv6 shows that if you "treat users nicely" you might not live to see the results.
And obviously we benefit too because we get to use a better language.
I don't believe it would take that much work to keep python 2 in maingence mode, and I also think if the PSF asked for a company to officially take over they would easily find one.