Hacker News Reader

>This is an important question because projects like Python will live that long.

Planning in the 20 or 50 years range is counter-productive.

Heck, whole countries might not exist by that time (the same way ex-USSR and Eastern European countries split into different ones).

Languages/libraries evolve and bitrot is a fact of life, yes.

Now you have me thinking about how to plan that long! You would need an architecture easy to port and good documentation...

Or become so important that old platforms are maintained for your sake!

Look for a job programming planes or trains or other infrastructure. Typical service time is ~30 years, some systems live much longer.