Re-contextualise what I said though. The heating isn't necessary because it's already allowed to charge fast enough without additional heating. It of course won't let you "put in 250kW" at any time for various reasons, but specifically in regards to temperature it's already limiting you from doing so if it would be detrimental. Right?
If I actually was able to get a faster charging rate with a hotter pack, sure, I might appreciate the intentional heating if speed of charging is my goal.
Though I've been very vocal about not liking their current heating scheme (mostly in regards to slower charge speeds), this might be a more defensible case. It might be readying itself for when you become the only vehicle on that Supercharger pair so that it can accept more power, which I think is a noble if unrealistic pursuit depending on the situation.
However, I'm skeptical that helps much since above 70% you're starting to get very limited in charge rate (less than 70kW if I recall correctly) and like you said, it's showing you can theoretically take more power.
Like another pointed out (thanks
@FalconFour), you missed the very important following three words: "for that case". Where that case was grabbing dinner.
Even on a long trip I find myself in this situation especially around dinner time. A longer break is sometimes appreciated, certainly longer than a Supercharger would give considering I need to park, walk somewhere, and eventually walk back before charging is done. We can hardly grab a nearby coffee at some Superchargers and make it back in time because the walking alone takes time. This is especially useful if you want to get more charge at the top end where charging is slower.
However if there are no services and I'm truly just stopping to charge (rare, honestly) then yes, charge me up as fast as possible!
So this is AC charging and outside of most of the point of this thread, but I find it hard to believe it ramped up significantly within just 10 minutes? Implying it heated the pack in less than 10 minutes? That said I'm sure the target temp for AC charging is much different and there could even be other factors to what the Stats app was displaying.