Another concept that, while certainly legitimate, can also be abused as a means to stop debate, is meritocracy. (The abuse of this concept often correlates to abuse of the bikeshed concept.)

I believe that I have observed improvement in this regard, however. It is more likely today that non-traditional (i.e. non-code) contributions are considered more favorably with respect to one's merit than such contributions would have been considered a year or two ago.

Even still, I don't think the contributions of, say, Ipstenu, ESMI, and Zoonini (et al) as WPORG Forum Moderators is valued as highly as it should be, with respect to meritocracy. So, there's ample room for improvement, but I can honestly say that I've seen some improvement.