It's kinda sad that stuff like Caltrain electrification, for example, has a huge and well-researched article despite not even being in service yet, just because of the large amount of Wikipedians in the Bay Area where the Wikimedia Foundation is headquartered. In the meanwhile, entire operational train systems both in China and elsewhere in the world that have vastly greater ridership, longer length, more advanced technology, etc, get nary a mention. I have nothing against Caltrain electrification getting a great article since I'm an inclusionist but it is just sad how little of the cool things, especially in China, are on Wikipedia.