Not only that, but their chart makes it look like adopting older languages now will give you more bit rot resistance.
C2: C89 or Python 2 a few decades a developer week
C3: C or Python a decade a developer month
When it should read:
C2: C99 or Python 3 a few decades a developer week
C3: C89 or Python 2 a decade a developer month
If you start a project today with python 2, the bit rot will be far worse[1] than python 3 which is now stable and doesn't seem to have any plans for future compatibility breaking changes.