With the new year, I wondered "how much my wiki has grown in 2017"? So today I saved the stats on Special:Statistics to see the what the difference will be by the end of 2018. And then, I thought: wouldn't it be a very good script too? Basically, something like RailWAM (but without the rail module) that records daily stats about the wiki in a database and then lets you display data in graph or make searches. I think admins, but also normal users, may find such data interesting.