How about this: There are use cases in 2014 that are not covered by a standard built in 1986. As such, to accommodate these things, people have made incompatibl

How about this: There are use cases in 2014 that are not covered by a standard built in 1986. As such, to accommodate these things, people have made incompatible extensions to the format, making interoperability very difficult. As such, we need to standardize the way we do these expanded things, whether we put some formal extensions to IMAP or we replace it.