It very much depends on your target audience. We’re in the web hosting business and whenever we try to be a bit more progressive, people start yelling at us th

It very much depends on your target audience. We’re in the web hosting business and whenever we try to be a bit more progressive, people start yelling at us that their IE 4-using customers in rural Mongolia can’t SSL-surf their shop. When it comes to mail, IIRC some business phones were behind too. OTOH iOS 6 support TLS 1.2, so if you’re just building a REST API for your own apps, you can go wild.