Paul Irish, wrote Browser Market Pollution: IE[x] is the new IE6, which details the complexities we have coming up for us as web developers.
I’m glad to see someone fully thought this through. Browser half life is a significant issue for website accessibility.
When was the last time someone asked you to get your site working in Chrome 9? Well, that was 3 releases ago, as was IE6 (I’m even ignoring the fact that Chrome 9 was February 2011, and not August of 2001 for IE6). I’m constantly hearing that a client is asking for IE6 support. I do all I can to dissuade them (logic, reasoning, and finally .. a 30% surcharge as it requires much more time to debug and handle), but IE6 support is still an issue. Why?
Because of the half life of Microsoft browsers.