[DisposableMike]

Despite a fairly large number of users on XP still (2.5% of total users on some sites I manage), I'll give you that it works on non-obsolete OS browsers. However, those are not the only pieces in the world of security.

Java, for example, only started support as recently as 3 weeks ago (2016-07-19)

[pfg]

XP is supported. There was an issue due to some schannel bug in XP choking on the issuer certificate, but that was fixed earlier this year.