Also, at least in Spain, 80% of the software creation is related to old systems updates. Most of them are based on classic architectures that don't evolve at al

Also, at least in Spain, 80% of the software creation is related to old systems updates. Most of them are based on classic architectures that don't evolve at all, using good-old languages that have been there for decades. Legacy code, as in "paying the bills since 1998". The set of skills is very different from the list you are presenting. Endurance is one of them, and I think older people will have more of that than younger ones. Maybe we all have been living in the tech bubble for so much time that we can even forget the fact we are part of a much more diverse world. It happens to me, for sure.