Are agile, DevOps and similar certifications worth it?

Certifications have always been about benchmarking and assessing IT professionals' ability to use technology and provide something of a guarantee that candidates are competent with needed skills in the workplace. But as DevOps, continuous delivery, agile, scrum and other frameworks become necessary, the question around certification of these skills becomes this: How can you accurately assess and measure the less-tangible, softer skills hiring managers require? And if you're an IT pro, do you nee