I can easily imagine ways that wikipedia could be better, but the reality is that compared to any other online resource, it is the best. I wish it were less political sometimes, but when I look at any other online resource, they are way more polarized. Periodically I read something (usually in HN) about wikipedia controversy, and I admit to some trepidation about their ability to stay objective as they have become so widely consulted (i.e. powerful), but if compared to any other real-world existing resource, given the current state of the internet, actually they are often by far the best.
The fact that wikipedia works at all is nothing short of a miracle!
There are some inventions where I'm like "Ahh, if only I had thought of that" and wikipedia is NOT one of those. I'm totally confident that even if I had thought of it there's no way I'd believe for 1 second that it would work.