Very true, perhaps something along the lines of sublime text. So at it's core it's just a fast simple email client. Then have a really nice plugin system so peo

Very true, perhaps something along the lines of sublime text. So at it's core it's just a fast simple email client. Then have a really nice plugin system so people can create their own plugins really easily to customize it or add functionality as they like. Of course non-geeks won't really understand installing plugins however others could create services (whitelabel versions) that have a bunch of plugins pre-installed so they work well out of the box.