About a week ago, Gus had a simple question: “is there an easy way to find the percentage of offline bridges with distribution mechanism = none?”. He asked if I'd maybe be interested in working on it, which of course I would.
I made a script* to track how many HSDirs run a version of tor that understands v2 onions. It runs every hour, downloads the current consensus, finds all relays that have the HSDir flag and checks their tor version. If the tor version is 0.4.[6-9] it is counted as being “nonv2” otherwise it is counted as “v2”