I think it's primarily down to verbosity when working with it by hand and very heavy weight parsers being used for it frequently. There's just lighter weight, e

I think it's primarily down to verbosity when working with it by hand and very heavy weight parsers being used for it frequently. There's just lighter weight, easier formats to work with and a lot of the standards that get piled on top of it lead to ever increasing complexity, xsd specifications, namespaces, etc.