This should really put any AAA studio to shame. A single developer sold half a billion dollars on Steam alone.
A winning lottery ticket would have an even better return on investment. Good luck with that business strategy.
(To be clear, Stardew Valley is a great game. But "making a breakout indie game" really does feel akin to winning the lottery to me, even if the game is fundamentally great.)
Why would it put them to shame? It’s an incredibly rare situation and most AAA devs would be super happy for him.
Stardew Valley is a very noteworthy achievement, but it’s not the kind of success anyone should expect to simply replicate.
Go for it, but most will not achieve a similar outcome.