And would your earnings be where they are now if you had a big gap in your twenties where you did a failed startup? (Depends on the experience it gave you, I guess.)
Despite a family, I have more disposable income net of tax now than my gross salary for most of my 20's.
Yes, your first few jobs in the technology field increase pay greatly over your first few years. Your overall expenses only increase if you decide to get married and have children in this time, but with youth putting that off, it's more common to make a lot of money without massive life changes.
After 32 years it's only 2.5x what I made when I was 21.
I wrote a blog post with a graph describing my income [0].
[0] https://medium.com/@brian.cunnie/software-engineering-income... special "friends" link does not count against Medium's quota