&gt;<i>Well no, about 10% of our traffic is from people sitting on those two browsers at work. Some of those people are even still running Windows XP, forcing us to use SAN instead of SNI certs.</i><p>This depends on many things. If your 90% brings enough profit, then this 10% perhaps could be dismissed, as it might not be worth the developers costs and time to keep support them (that needs an &quot;opportunity cost&quot; calculation).<p>There&#x27;s also the fact that that 10% is only gonna go down, never up again.