When I first became an editor at Wikipedia, I noticed that other new editors had welcome messages on their editor pages. Other, more senior editors had thanked them for their recent contributions, welcomed them to the community, offered them some useful links to have a look at, and let them know that if they had any questions or difficulties, they could contact the senior editor about it at any time. I had been editing for a little while at this point and had still not received a welcome message, and seeing them on the pages of editors who were newer than I was made me feel ignored, if not straight-up ostracized. Clearly people cared about the presence of these other new Wiki editors in a way that they did not care about me.
Or so it seemed.