I worked at Google for 10 years and didn't have more than a few minutes of job satisfaction and jumped from team to team hoping to eventually find a place where I could fit in and maybe get promotion. But I never went for promotion ever. The whole process looked meant to demoralize. I was clearly not a "culture fit" -- as they call it -- but somehow I soldiered on and nobody cared.

Until eventually, after 10 years of L4, it became clear me I had wasted 10 years of potential career progression because the money was (at least) twice as good as what I would have gotten in a smaller local company where I would have more impact and creative input. The rest of the industry was off doing other stuff, and my friends moving into lead and management jobs, while I putzed around moving protobufs (with just the right comments, indentation and stylistic flourishes) around Google's walled garden. Any interesting work was snatched up by others faster than you could get it.

Promotion level at Google is only loosely corelated with programming or engineering talent. It's a measure of political skill and motivation, and your ability or desire to thrive in a large organization.

Don't get me wrong, the money was excellent and my priority was feeding my family. But it wasn't "retire early" money, not without a lot of severe financial discipline and restraint anyways.

Google got lucky 15 years ago and managed to turn on an absolutely massive firehose of money in ads. Now Google hoovers up as much talent as they can in hopes that they'll strike it lucky and turn on a second or third revenue faucet. But spoiler alert: they never will. So they have to settle for attempting to starve potential competition of talent.