I'm developing an organization web application geared towards creative thinkers, with productivity tools for freelancers and small group collaboration; designed responsively, the app will work on mobile, tablet and laptop/desktop.
It's completely anecdotal but my target audience (on laptop/desktop) is typically aware of Internet Explorer 6-8's inadequacies and/or at least "hip" enough to use IE9, FireFox, Safari or Chrome.
I'm curious about how common it is for niche web application developers to disregard legacy browser support, especially when supporting them will more than likely introduce problems surrounding integral application specifications.
The user-experience and overall quality of my application will be far greater if I don't spend time problem-solving and making concessions for legacy browsers; anything I should be conscious of if I decide not to support IE8?
Edit: I've been looking through http://gs.statcounter.com/ to get an idea of browser version usage in different geozones, and it seems that IE7 is around 3-4% in most of my target geozones. I updated my post and removed specific references to IE7, seeing as I feel comfortable not supporting it.