This is pretty cool.

My "project that doesn't make me money" is https://transitfeeds.com

Currently it archives a ton of static schedule data, and some basic GTFS-realtime archiving stuff.

My longer-term goal is to archive all the GTFS-rt feeds every 30 seconds to provide similar analysis to what you've done here.

Obviously this requires even more storage than I'm already using and a ton of data processing, which is probably above my pay grade.