Very cool stuff.

I'm curious what a 4.0-only analysis looks like -- it would remove songs from years ago that are rarities or outright shelved, bring in newer material, and better reflect their current songbook (acknowledging that it's always a moving target, with new material in 2023 and TAB tour hinting more to come this summer).

From a forward-looking perspective, it would be interesting to get a plus/minus for that period and see how predictive it is for the rest of 2024.