I've spent a lot of time over the past couple of months thinking about how it would be great to move to microservice architecture to help with the "ball of mud" our codebase has turned into. The benefits seem really great, but it's such a daunting hill to climb. You can't just have a couple different services and boom everything works. You need to worry about consistency, efficiency (e.g. no database joins), and so many other things. Then there's a question of how do you handle things that used to be simple-- i.e. a POST request maybe used to return an id but now it just returns 201 and that's it since you have event sourcing and the instance is eventually created.

In the end, I wonder how many companies really need microservices. What if boundaries between apps were actually enforced?