Version fragmentation is nearly a non-issue if browser updates are automatic by default and non-intrusive. Firefox is slowly catching up, and Chrome is very go

Version fragmentation is nearly a non-issue if browser updates are automatic by default and non-intrusive. Firefox is slowly catching up, and Chrome is very good at this. IE would obviously need to substantially change its release cycle if it lost enough market share, though I imagine that won't happen for quite some time.