Ruud Teunissen, a senior test consultant at Polteq Test Services BV, argues against the notion that testing is becoming obsolete, emphasizing the ongoing need for skilled testers amidst evolving technologies like cloud and mobile. He highlights that while the testing landscape is changing, especially with the rise of DevOps and outsourcing, the craft of testing remains critical in preventing defects. Teunissen calls for organizations to retain testing expertise to effectively navigate new paradigms and maintain quality assurance.