Some semesters I was doing like 70-80 hours a week on average, split between managing clubs, homework, attending class, working part time jobs, studying. One week I remember being busy from 7am to 2am for 6 days straight. a few semesters I had a lot of free time, like second semester of senior year, and first semester of freshman year, but mainly it was the gaps - after midterms, during breaks, where I had obscene amounts of free time.
I learned a lot from my CS classes, but I actually felt like most of the value from the degree came from overhearing random chitchat between professors or other students and the reading more about those ideas and experimenting with them in my free time.
Both before and since I've had more free capacity to pursue learning for it's own sake.
Also hard subjects at uni - there is only so much deep thinking you can do per day
Since then workload has been intense of course but never comparable. I've had much more time to be able to explore personal interests since college.
Once I started full-time work it was like a revelation - finally I don't have to work on evenings and weekends! I actually get free time to myself! I can have hobbies!
I know very few university students with significant work commitments.
In the US, the stereotypical college student is not also holding down any kind of job. Maybe 5-7 hours of "work study" (light work running the reference desk at the library or working in the dining hall).
Frankly, I doubt the majority could do learn a lot and also work a significant number of job hours.
At a community college, it would be very different - most students also holding down jobs, I would guess. At a flagship state university, I would be very suprised.
Evidence in [1]... about 30% of full time students are working 20+ hours/week. Also apparently I was wrong about the low hours being typical; less than 10% are working but < 10 hours/week.
I was. Didn’t have anywhere near the free time and the lack of stress I do post-college. Helps that I also make a good chunk of change rather than living off a relatively small stipend in one of the most expensive cities in the world.
No kids, no sports, no community involvement, no side hustles, no expectations.