I agree that its best to compare the Plus to the Bolt as your usage cycle (miles between charge) will be more consistent. In Jan/Feb we can start to get the 1 year view on those packs.
Does the Bolt give you access to the actual SOH or true remaining kilowatts?
My one concern with some of the Tesla degradation reports (with exception of those rares cases of fast degeneration - see tesloop), is that to base it purely on miles on the GOM doesn't account for driving style impacts (most Ev drivers get more efficient as they learn to drive an EV), and any behind the scenes algorithm changes. A Tesla (or Bolt, or Leaf) on miles of range basis could show 0 degradation after 5 years, though still have battery loss.
Even in my 2013 Leaf with 11 bars, my average 100% range was 81 miles. Thats only 4% loss from the EPA 84 miles when I bought the car. Truth was more like 20% or so.