Since I am now 30 years into the this career, I now see the young software engineers and wonder to myself what a shit-career they must be embarking on. I don;t know that for sure — I don't know how much I am just projecting, or is Software Engineering just not as fun as it used to be for some of the reasons you cite (too much changing too fast, never a sense of being able to fully control/own the architecture)?

Regardless, it gives me some comfort to know that I've enjoyed a good part of my career up to this point and I'm a lot closer to being on the way out of my career than the way in.