So, there's obviously a miss on testing this here [1], but I wanted to make another point about the wisdom of embedding code that you cannot test, thinking that

So, there's obviously a miss on testing this here [1], but I wanted to make another point about the wisdom of embedding code that you cannot test, thinking that it would have no effect, with the expectation that at some arbitrary date in the future (which you don't control) it will change the visual appearance of your landing page to something else... that you haven't tested. When iOS 9 came out, it wasn't like people were just resubmitting their apps without ever running them once. [1] I'm willing to buy that Windows represents a minority of browser share to Medium, although it still seems doubtful that it's such a small share that making visual changes to your global CSS doesn't merit testing on that OS. Was this just a line in some larger diff? "By the way, I changed all the fonts; works on localhost"?