I think its more: A) power users having different priorities to light users. That tool you use every day, you probably use keyboard short cuts, know all the fl

I think its more: A) power users having different priorities to light users. That tool you use every day, you probably use keyboard short cuts, know all the flags. The tool you use once every 6 months, you probably scan the menus and check the man page. Open source tends to be focused more on the power users, mainly because its probably power users that made the thing to start with. B) open source tends not to be a 'product'. There aren't focus groups and usability testers, the first releases are Alphas and Betas so tend to attract technically minded people that find their way around less discoverable interfaces.