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Not a super big impact professionally. Creating and maintaining distributed systems is hard. And even harder when business requirements, stakeholders, etc. get involved.

One major take away I got from the course is to limit the more RPC-driven services I typically saw up to that point (and still see in current microservices examples to this day).

He also gave a lecture on the different types of coupling, which I had never even heard of prior to the course.

He also has a few talks on YouTube as well as others that work at Particular Software. I'd highly recommend checking out all of them.