> But for me the biggest problem with adoption of SSL is still that every domain name needs it's unique IPv4 address, and all problems that come with that, not registering or paying for the SSL certificate.
Only if you care about IE on Windows XP (which is no longer supported and no longer gets security updates) or Android phones more than 4 years old (2.3 Gingerbread and older). SNI works fine on other devices.
Have you measured? Do you have numbers for how many users you have running one of those two environments?
New phones are still being sold with Android 2.3 here [1] in Ecuador (which is ridiculous), so for some markets you do need to verify what your target audience uses before making assumptions like that.
Only if you care about IE on Windows XP (which is no longer supported and no longer gets security updates) or Android phones more than 4 years old (2.3 Gingerbread and older). SNI works fine on other devices.
Have you measured? Do you have numbers for how many users you have running one of those two environments?