[yk]

This was also my first thought. But with changes as big as Python 3, there is probably no way around this.

[gregbair]

How does that explain the four "current" versions, then?

[jgeralnik]

There aren't 4 current versions, there are 2. The other 2 are old versions that still get security updates.

[davvid]

Security releases are for old distros/users.