"As long as a measurable percentage of your users are still on these browsers, you're missing out on money of you don't support them." This seems to be a commo

"As long as a measurable percentage of your users are still on these browsers, you're missing out on money of you don't support them." This seems to be a common refrain here. It's missing an important caveat: "unless supporting those browsers costs more than the customers are worth". Supporting ancient IEs means things like: avoiding features that can't be polyfilled, providing XP images for CI, debugging IE issues, etc. None of these happen for free.