Personally I feel like you could just offer them side-by-side until you wean off of one onto the other. But because there are no replacement protocols (at least

Personally I feel like you could just offer them side-by-side until you wean off of one onto the other. But because there are no replacement protocols (at least that I know of) that have a chance to replace email who knows how feasible that is. As a developer when I approach a system that needs to be completely redone to be improved I try to look at how to best accomplish the goals, work out an implementation then figure out how to best provide backwards compatibility because I'm always worried going the other way is going to hamper the final product. It doesn't have to but that's how my mind works.