[gaetgu]

I somewhat agree. I also think that sometimes going backwards is exactly what people like. For instance, mechanical keyboards are pretty old and largely replaced, but so many people like them so much that they are willing to spend a lot of money on them.

[sflicht]

But they are also better. (Just more expensive and/or bulkier, i.e. their pros come with some associated cons.) Whereas delayed send / batch read only has "advantages" in the mind of the user, who could achieve them for himself or herself quite easily.