80 world-class engineers sounds like more than enough people. It’s not like Valve struggle to acquire talent and are thus forced to have teams and teams of juniors who are masters at building tech debt.
Valve will likely be hiring and retaining the kinds of engineers who love a good refactor and appreciate the time and space to do that rather than some product manager pressuring for the next shiny shit they wanted yesterday.
And Steam is their money printing machine that keeps them free to do whatever they want. It’s no surprise their team have stayed invested in continuing to build out the best gaming platform of all time.
80 talented, passionate, and healthily paid engineers > 800 junior, sleep deprived, and struggling to buy groceries “coders”.