I don't think web developers are truly helping web visitors by supporting outdated web browsers. Old browsers are security risks.
Opera Mini, IE 8, IE 9?
I'm not really a Microsoft hater. I liked the good old days where ~90% of visitors used IE. That made testing simple. But today, it's looking pretty bad for IE 6, 7, 8, 9 and even 10...
Beginning January 12, 2016, only the most current version of Internet Explorer available for a supported operating system will receive technical support and security updates.