Developer came to our area to rant a bit about a problem he was having with Xamarin. A particular android device was receiving a java runtime error trying to de-serialize data from a WCF contract. What he found was not to use WCF and use WebAPI (or a simple REST service that sent back/forth JSON).

When he proposed changing the service (since the data transport didn’t really matter, he could plug the assembly into a WebAPI project in less than an hour), the dev manager shot down the idea pointing him to our service standard that explicitly stated no WebAPI (it’s in bold letters).

I showed him the date on the “standard”, which was 5 years ago. We have versioning on our sharepoint server, so I also him my proposal notes on the change request document (almost two years before that) stating we should stop using WCF in favor of REST based web standards. Dev manager at the time had wrote in his comment “Will never use REST. Enterprise developers prefer RPC.”
He just about fell over laughing when I showed him this gif.