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That being said, I wouldn't use the US as some bastion of progress. Technically, we haven't progressed much since the 70s? 80s? outside of GDP going up, but that's just a number on a chart. Most of us today could go back to the 70s and live not much different than now (compared to the any earlier decade). It's mostly a side effect of being the world's reserve currency.
Having done this prep, I can't tell if this comment is sarcasm. Building real systems makes you a good engineer. Maintaining systems over a long period of time makes you a good engineer. Working with other experienced engineers makes you a good engineer.
Doing this prep you do learn a few things along the way, but it's contrived. You already know what you need to learn, which is often the hard part on the job. It's works as a filter since the ability to learn concepts is important, but it's usefulness continues to trend downwards as it becomes more standardized.