All the problems with “Rapidgate” on the Nissan Leaf 40kWh and larger are caused by the battery heating effect.Why do you say 50 kW has a large heating impact? Sources for that information?
A Model 3 isn’t a Kona and it’s obviously not “pence” and a few “free Watts”.
I ordered a 40kWh Leaf in early 2018. Because the Rapidgate story had just broken, I arranged for an extended test drive, in order to use a rapid charger and see the effects. I was only charging on a max 50kW CHAdeMO charger, so getting rates up to low 40s.
While charging the battery temperature gauge on the Leaf was going up. During the second charge the battery was so hot the car was throttling the charge rate to 17kW. I cancelled the order for the Leaf.
I charge exclusively at home, and that adds about £20 a month to my electricity bill.
As you correctly say, a Model 3 isn’t a Kona, or a Leaf. But they are all based on similar technology. I’m not saying I’m correct, and I’m only trying to help.
It’s your battery - you do what you like with it.