Well, I need it to access my local council website, read the mail they send me. or access certain parts of the Chinese UK embassy website that wont work with anything newer.
Seriously, my local council AND county council still send out emails and "M$Office" forms coded with dangerous activeX scripts everyone else banned 10 years ago. Some of it contains so many active scripts, you need M$Office 2008 (or earlier) just to read them - plain text readers cant make head nor tale of it.
As for M$ saying disable AV, well, if you are using IE, you are probably also using M$ Defender - and we all know how effective THAT is - no one will be able to tell if it is running or not.