One of my classmates was a co-founder of a company that had a near-$100M exit (acquired) ~10 years ago (back when that was real money). That sounds like a lot, right?
By the time the VCs took their cut, the equity grants were deducted, and the founders split the proceeds.. it wasn't life changing money.
The money wasn't much different than a typical equity grant at a FAANG for a 30-something dev. Especially after 5-10 years of effort. And then you might be stuck working for the acquirer for some contractual period before you can exit.
It was also one of the many ZIRP businesses that would never be bootstrapped. That is - gain a bunch of customers by giving away services for free in hope that you somehow get so many that you can ... do something, later.