Microservices are a thing now. It's official, and chances are you know that. Rather than enormous, single-piece architectures, microservices introduce a modular approach to building systems. You've read plenty of content on this site about how important microservices are, and how to go about building them.
Do you know why a team decides to move to microservices? I didn't either, but for the Soundcloud team, it was a matter of productivity over any technical reasons.
In this article by Phil Calçado, a SoundCloud engineer, you can read the thought process behind the company moving to microservices for their "V2" site revamp. There's a lot about the Ruby-on-Rails app and web teams working together, and implementing effective process workflows. It's definitely a great read for anyone interested in IT transformations and microservices.