The first company I worked for went IPO a year or two before I joined. The very first admin of that company got so rich from stock options that she bought a vineyard and retired in 1999. Lots of people bought houses with the money they made, including the first engineer who bought a house in prime PA.
I joined another startup just a few years ago, and they were extremely stingy with options. "Less-important" people (ie. anyone non-engineers, or non-management) were getting a few hundred or maybe a few thousand options, which I thought was a bummer. I think everyone contributes to the success of the company, and everyone should get a chance to do well if the company does well. But I've seen this case several times where the founders keep everything for themselves.
I'm not sure what changed, but it's probably reflective of how greedy and self-centered SV is getting. It feels like it's more like Wall Street and less about classic Silicon Valley, which is a shame. Go watch "Triumph of the Nerds", the classic tv special during the dotcom boom and see if you can reconcile the difference of those companies and the ones today.