Most developers have lifetime earnings of that kinda figure. Earning a million dollars total (adjusted for currency differentials) over a decade is an absolutely insanely huge number. that is closer to my expected lifetime earnings than decade earnings. 300-500k$ of value in total in a decade is more realistic for an average value, with a small company to large company difference being maybe 100k over a decade.

All in my location, country, etc.

For many, it is happiness and focusing on other things in life once they have the means. Millions don't really matter if that's not a motivator in life.