Current macOS system Python is 2.7.10 (Mojave 10.14.5).
Upstream Python is 2.7.15.
... and 2.7.10 is from May 2015 - 4 years ago
Similarly I think it's misleading to imply Apple ever really encouraged the use of Python given they never shipped with 3. Those minor version upgrades are the bare minimum requirement to produce a stable product.
And I'm not saying those Linux distros are any better, although at least they typically have officially supported Python 3 packages, even if they are not installed in a stock installation.
It is not correct to say that Apple did not maintain support for it.