Yes, I find this and similar articles to be so light on specifics as to be practically worthless. I think what this analysis is alluding to has been going on for years anyway. My experience is that most projects of note are very receptive to contributions, but there is only so much they can do.
Besides, compare say, the state of Linux (as the article mentions) today to what it was five or ten years ago and it would be hard to deny the improvements in 'usability'. These things don't happen overnight.