From Wikipedia:
Python 2 was discontinued with version 2.7.18 in 2020
So maybe not that ancient of a Python version,
However, Wikipedia also states:
Python 2.7’s end-of-life date was initially set at 2015 then postponed to 2020 out of concern that a large body of existing code could not easily be forward-ported to Python 3.
The 2.6 run of Ruby was released in December 2018 and is still maintained (2.6.7 is the newest 2.x), but is at end of support. 2.7 was released before the release of Big Sur.
What one can wonder, is why the OS even ships with these interpreters? Surely, I should just be able to install a dev-package, if I needed them?