I doubt many (any?) startups would match FB's 10-year senior engineer's total comp. That would burn up the startup's cash (and/or ownership) very quickly.

I think the main draws at a startup for a post-FAANG senior engineer are feeling good about the product they build (more useful to the world than FB's ads) or the role/environment (less bureaucracy and org process). I am sure there are many exceptions, but I suspect that after 10 years in a senior role at a FAANG money stops being the most important thing you need from a job. My 2c.

I’d assume after ten years at FAANG, you’d have a decent amount of money saved up as well.

You can, but when you're making that much above what a series A or B company pays, it's not a useful number. Having multiple offers that are comparable is what matters. A company can go ±5% but it's not like they offer you $180k and you give them your $800k Facebook total comp then they're like, "oh, I guess we'll give you $800k then."

I wonder how he valued that equity when determine total comp.