That interface is certainly inconvenient to use, and potentially quite dangerous without a clearParameters(). It's not at all a rebuttal of the article, though

That interface is certainly inconvenient to use, and potentially quite dangerous without a clearParameters(). It's not at all a rebuttal of the article, though. The article points out that the number of unit tests a design requires is larger for more complicated designs. An interface like yours would require no fewer tests than another interface exposing the same functionality using conventional function calls.