I sympathize with both sides of this argument. The author is correct: If you're providing a service on the web, especially a widely used one, you should make it usable for all web users to the fullest extent possible, regardless of browser.

But on the other hand... boy am I glad I switched from web dev to primarily back-end work. Building and maintaining complex software that works reliably in one environment is enough of a challenge as it is... without all the extra variables of an ever-changing landscape of browsers and devices, with varying levels of feature support, all of which you have zero control over.

IMO being a front-end dev is borderline masochistic :)