I have server access to a couple of thousand web sites, I haven't calculated the stats precisely but the percentage must be around 20% on average of users visiting those sites still use IE6. That's simply too big a margin to ignore. It's a nuisance and in an ideal world it would be nice not to have to do it but with a good browser sniffer and a couple of tried and tested scripts it's not that much of a deal to keep those users happy.
People don't like change, they feel comfortable with the interface they're used to. If you owned a 10 year old car would you be happy if suddenly no parts were manufactured for it just because a new model was released?
