Probably, it's the result of schizo-histerical tech decision process happening in some companies "we need fancy tech and NOT THAT XML". Sometimes it's for OKRs

Probably, it's the result of schizo-histerical tech decision process happening in some companies "we need fancy tech and NOT THAT XML". Sometimes it's for OKRs and power/politics balance between departments and teams in an enterprise. "If an existing tech like XMPP is used then no serious development could be needed" fear (which is not really true). It can lead (and leads) to a huge waste of resources and overspending. But it's a bit similar to building a luxury house. Not because an owner needs it. But because he can afford it.