Comment by atleta

I actually find the model in the article pretty convincing despite agreeing with you on that it's a profession for people who like to learn knew things and that university/grad school should teach more generic, theoretical knowledge that depreciate slower.

However, these still don't invalidate the main point of the article, that a faster rate depreciation means that your max knowledge level, given your specific rate of learning, will be lower. I.e. your advantage over a less skilled, younger professional will be lower.

And you may say that learning a new 3D library shouldn't be counted as learning a new skill, but it doesn't make the problem go away. If anything, it underlines it: if you have to start working with a new 3D library then you will have to spend time and effort on learning it (to become efficient at using it) while if you were able to keep using it, you could spend that time and effort on learning something that we could count as a new skill.