Working in the B2B world, I can tell you that unfortunately many buyers are still running on archaic systems. Many projects still require support for these old

Working in the B2B world, I can tell you that unfortunately many buyers are still running on archaic systems. Many projects still require support for these old browsers. In the B2C sector, there are so many users that the few who don't upgrade are just a tiny afterthought. In the B2B sector, where a single company not upgrading can mean that more than half of your customers can't use your website, it's a whole other issue.