what am I missing by not building in features that would make me want my visitors to not use IE?
I'm guessing the answer is: Clients. I haven't had one yet whose site was so simple that it avoided issues with IE6. Of course, you might have clients who are less demanding or have more austere tastes, in which case they're really smart because working around IE bugs costs money.
The easiest way to answer your question is to point you at this catalog of IE's deficiencies:
IE, particularly IE6, is a great illustration of PG's observation:
The distinguishing feature of nasty little problems is that you don't learn anything from them... writing an interface to a buggy piece of software doesn't teach you anything, because the bugs are random.
I'm guessing the answer is: Clients. I haven't had one yet whose site was so simple that it avoided issues with IE6. Of course, you might have clients who are less demanding or have more austere tastes, in which case they're really smart because working around IE bugs costs money.
The easiest way to answer your question is to point you at this catalog of IE's deficiencies:
http://www.positioniseverything.net/explorer.html
But if you want a document that really captures the essence of IE-induced terror, you can skim the invaluable "On Having Layout":
http://www.satzansatz.de/cssd/onhavinglayout.html
Don't read it all at once. It's exhausting.
IE, particularly IE6, is a great illustration of PG's observation:
The distinguishing feature of nasty little problems is that you don't learn anything from them... writing an interface to a buggy piece of software doesn't teach you anything, because the bugs are random.