whats unfortunate is that companies/developers dont move along in upgrading web apps quickly [im sure for a variety of legitimate as well as craptastic reasons like poor planning and lack of fiscal understanding and responsibility] so a lot of places will be stuck on old versions of IE for some time.
im fortunate where i am, in that most everything works in IE11, or at least with compatibility mode. XP is almost gone at work and windows updates are pushed out monthly. a lot of places, however, cannot do that, or cannot move as fast as we can to get rid of old systems or roll out updates :-/