A great write-up on event sourcing. Loved the xkcd cameo and the approachability of the text.
The idea itself seems useful and is partially embodied in other practices such as message queueing (job deferral, see RabbitMQ/beanstalkd) in webdev so it's not entirely foreign but taking it to an extreme seems to have its benefits as well.
Too bad nothing I'm currently working on could make much use of splitting into such tiny microservices, not least due to resource constraints (yay indie life).