I target a similar audience (freelancers). If anything, a feature would be supporting IE, especially when your app does a lot with CSS3 and bleeding edge HTML5 stuff.
And features need to be justified. Planscope (http://planscope.io) gets less than 2% of all traffic from IE (chart: http://dl.dropbox.com/u/2205912/iestats.png), and for actual accounts there's only been one person with IE - and that was a client that one of my customers invited in. 5 minutes later, Chrome Frame was added and everyone was happy.
I've also recently built a social network for amateur gardeners. The average age was probably 50. Did I ensure IE was fully supported? You bet.
And features need to be justified. Planscope (http://planscope.io) gets less than 2% of all traffic from IE (chart: http://dl.dropbox.com/u/2205912/iestats.png), and for actual accounts there's only been one person with IE - and that was a client that one of my customers invited in. 5 minutes later, Chrome Frame was added and everyone was happy.
I've also recently built a social network for amateur gardeners. The average age was probably 50. Did I ensure IE was fully supported? You bet.