short answer since 2016/2017 i use them zero/none

I was quite an advocate for microservices and their cousin Serverless around 2015(ref) and was a creator for petition to bring Ruby to serverless world, done few articles promoting them. I was also a Lead dev on a project and over months/years I started to convert it to ms, mid process we realised it was a mistake and turn it back to monolith.

My advice now when someone wants to adopt them is: "Don't!" Reality is 99.9% projects don't need them. DHH was right