Rails apps make RESTful services fairly easy, even if it doesn't usually cover the entire spectrum of RESTful actions. Many Rails (CRUD) controllers are going to have 4 RESTful actions built into that one controller/service, so a single app might have one RESTful service for each model (assuming it is exposed).
SOAP has been overtaken for sure, but I think that first pie chart set should show the number of services, not just the percentage. My guess is that the number of SOAP services may have grown, but the number of RESTful services just grew much more quickly.
Rails apps make RESTful services fairly easy, even if it doesn't usually cover the entire spectrum of RESTful actions. Many Rails (CRUD) controllers are going to have 4 RESTful actions built into that one controller/service, so a single app might have one RESTful service for each model (assuming it is exposed).
SOAP has been overtaken for sure, but I think that first pie chart set should show the number of services, not just the percentage. My guess is that the number of SOAP services may have grown, but the number of RESTful services just grew much more quickly.