[rbarragan]

I totally agree with you here. It's personally my best type of learning. The only downside of this approach is the cost. It takes a lot of time compared to other types of learnings, including reading + spaced repetition explained in the article.

Do you have thoughts on the cost or how to optimize that type of learning?

[CuriouslyC]

This stuff could be picked up in internships and apprenticeships, though in a lot of cases the state of the art is quite far beyond that, so you'd need to join a hobbyist club to really get that sort of experience. Hacker/maker spaces often have outreach events, and builder fairs are good for reaching out as well.