I've collected some train stats: https://github.com/thcipriani/releng-junk/tree/master/deploy-stats#train-stats
For each train:
- Patches/train
- Rollbacks/train
I think we could glean some additional insights with:
- SLoC/train
- time spent rolled back/train
- total time spent/train
- blocker tasks added/train
- avg patch size/train
- stddev patch size/train
- avg patch age/train
- stddev patch age/train
- avg patch comment \#/train
We could collect more, but that's what I thought would be useful recently.