The vast majority of current development out there is in python 2.x. A small minority use Python 3.x. How on earth does this make Python 2.x obsolete?
This is like saying Perl 5 is obsolete, just because Perl 6 is out and completely ignore the realities of the real world use of the products.
Here is one recent one: http://www.randalolson.com/2016/09/03/python-2-7-still-reign...
If you have counter statistics showing that Python 3.x is more popular than 2.7 I would very much like to see them.
2.7: 10 million (M)
2.6: 0.5 M
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3.5: 1 M
3.4: 0.750 M
3.3: 0.05 M
3.2 and 3.1 too low to make a difference.
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So totals:
Python 2.x: 10.5 M
Python 3.x: 1.8 M
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Python 2.x is waaaaay ahead over 3.x
But to be fair, even with that, I doubt you would get more than 30% of Python 3 users. Which is kinda in line with other surveys, such as the one from JetBrains. (It's probably a good guess that users of Python applications are even more conservative in upgrading than developers of Python applications.)