I've got a feeling that in the SOA days the services were just "services", not microservices. I.e. people were not pushing for 200 lines of code microservices, like they do now. For example, I have a team of three devs at work who wrote a backend of around 10 microservices... Total cargo cult.
Microservices have been around for over a decade. They were called service oriented architecture and instead of REST with JSON they sending XML.