Interesting. I own a hosting company, and we don't offer < PHP 7.0 or 7.1 at this point. I dislike nag messages, but understand why Yoast is doing this. I would add that it's unusual to run into PHP 7 incompatibility problems for site owners using legitimately coded plugins The benefits are significant. Not sure I understand the clawing some do to hang on to deprecated versions of stacks, other than maybe a culture of laziness and refusal to adopt reasonable standards.