That counts people who weren't a good fit and were let go early after hiring, mass layoffs, and mixes mixes startups and FAANG and consulting churn, none of which is the typical corporate IT worker scenario, and all of which bring the average down (but are not "hopping").

Corporate IT, government IT, smaller SMEs, and stable SaaS, have higher averages.

Again do you have any actual evidence? Citations?

Do you have actual evidence it excludes them?

You're making the stronger claim.

Experience says most absolutely don't jump ship every 2-3 years in the kind of companies I mentioned. Now, if you think companies are playing a rotating musical chairs game and are majority new people every 5 years, ...

Well your anecdotal experience means no more than mine across 10 companies - including startups, small to medium size “lifestyle companies” and two at the time I worked there F10 companies - GE and Amazon.

I can’t go to management - who when I was working as a tech lead pre 2020 - were CTOs, Directors, founders and at times having to talk to the PE owners without solid data.