I am not planning to stay out of tech altogether though, at least long term.
Retirement is inherently a choice to earn less lifetime money and pour that time into family and other things you like doing. Waiting for the next vesting cliff is inherently a choice to earn more money and spend less time on your family.
Healthcare is the item that most FIRE folks underestimate. It was actually pretty tenable when the Obamacare subsidies were more fully in effect. Now that those are mostly gone it's a much larger line item in the household budget. I've only got a couple of years until Medicare kicks in so I'm not too concerned - unless they mess that up too - but for folks thinking of FIRE'ing in their 40s & 50s with kids still at home it's probably not advisable now.