There’s definitely a network effect that makes everyone converge on tokio. However, I don’t think the situation can be improved by putting an executor in std.

There’s definitely a network effect that makes everyone converge on tokio. However, I don’t think the situation can be improved by putting an executor in std. That will even more strongly make everyone stick to the standard one. The problem isn’t that it’s hard to pick an executor (you can pick tokio without thinking). The problem is that when someone has a legit reason to use a different executor, it’s hard to avoid dependencies using tokio, and it would be even harder to avoid dependencies using a built-in executor.