I think Async was not very big for big legacy code bases. I have used it a handful of times, but it had nowhere near the same impact as Linq and lambdas had on

I think Async was not very big for big legacy code bases. I have used it a handful of times, but it had nowhere near the same impact as Linq and lambdas had on my daily activities. In fact I would say that has had the single greatest impact on my coding style and habits...