I think you see hope Leave the complexity of WS-* behind and support REST and JSON because they are simpler to use and do not require successful use of frameworks. The problem that WS-* is trying to solve on the surface is not a problem for most users, but They have to pay for complexity in any way.
Are people still writing SOAP services or are they past architectural shelf life technology? Will people return to binary format?
The alternative to SOAP is not a binary format.
I think you see the desire to leave the complexity of WS-* behind, REST and JSON are supported because they are simpler to use and do not require successful use of the framework. WS-*The problem that ostensibly tries to solve is not a problem for most users, but they must pay for complexity in any way.