I think you’re right, I see that his resume links to Distinguished Engineer roles at Google / Amazon. Which … I don’t know. At my FAANG-adjacent company, there have only ever been _low_ single-digit number of ICs at that level. We’re talking 0.1-0.3% of all engineers. And they had insane track records.
And FWIW I think that there’s at least an order of magnitude more “happy L5s” older than 40 at FAANGs than senior staff+