I've been a little frustrated recently by a couple of users who don't seem to understand how important our volunteer devs are. It's not entirely their fault; they're just so new, compared to MediaWiki's existence, that they have no idea that the entire concept of MediaWiki software was a volunteer achievement. The WMF devs are working on some large, high-profile projects, and the result is that "volunteer dev" sounds like "second-class dev" to these new folks.
So I have just started a page, How to become a MediaWiki hacker/Volunteer achievements, on which I've listed a couple of obvious, user-facing changes that were written by volunteer devs (even if said devs were later paid to work on MediaWiki).
I'm secretly hoping someone will tell me "No, that's just a poor duplicate of <this much, much better page>", but, failing that, if there's anything that you did, or that you know someone else did as a volunteer, please expand. I'd like people who are interested in become hackers to know that volunteer devs can do real things here, and for non-technical users to be able to see that volunteer devs have created many of the things that they use and rely on every single time they read or edit the site.
Thank you–to all the volunteer devs, for doing your work, and to anyone who can help me expand this page, for helping honor that good work and educate the next generation of users about our debt to the volunteer devs.