Universal, component-based application is the answer of the "boundary" in the article.
You got both wizard and engineering solution, which is simple, easy to delete and FUN.
I've read just here on HN that microservices architecture is none other than an implementation of the original concept of OOP.
Suppose the thing you are dealing with is “Customers”, then with OOP each Customer is a separate object, while with MSOP you must communicate to the service which Customer you are talking about. The thing you talk to and the thing you are talking about have different identities.