I don't doubt that, but it's pretty rare. I know several devs in lead/expert positions(not in games, in finance, in consulting companies, in DWP and NHS) and no one breaks £100k/year. It happens, but it's very rare(in my experience).

I work for a large US tech company (not a FAANG). Getting in early on the Kubernetes bandwagon has helped me a lot . I used to work for a research consultancy and was paid significantly less then (but the work was a bit more interesting)