Why is accelerated networking opt in? It seems like making it default would improve these comparisons a lot and would help a lot of your customers who likely haven't found this setting either.
I don't know offhand, it's a different team that runs it. I'd guess it's something related to backwards compatibility and the general "roll big changes out slowly so it doesn't break" credo. And it may be tied to a certain kind of HW that supports it, which doesn't exist everywhere, since cloud providers can't just throw out all their HW each time a new feature comes in (as much as we wish we could). But that's just a guess.