I don't think you even need top dev talent to build Twitter now. Maybe you did back when it started, but it's not something a team of experienced, competent, 'regular' engineers couldn't build and more successfully than 'top' talent.
Let us start with engineering team A and and an equally talented engineering team B. If team B had the luck to work on a successful product due to a successful market, we call them talented. If A flamed out due to unpredictable reasons (that their market turned out to be shit), we lambast the lack of ability of team A.
But technical talent is definitely not overrated - because there are too many examples where talented teams have built unicorn multi-billion $ businesses.
I guess there's that.. but at a rate of 2 million a year, if someone was under-performing I'd imagine Elon would quickly be able to cycle in and out. And if the whole thing fails after 1-2 years, it's still not even half a billion spent. Compared to the titanic Twitter sinking.
