Okay, good news about charging at a rate over 50kW. My car has been at my local Jaguar dealer for several days, and they did some sort of software update (sorry, not sure which one). After, I spoke w/ both the tech and service manager who informed me that Jaguar in the US does not allow cars to charge over 50kW due to warranty and battery concerns. And, the service manager double downed on idea that "up to 100kW" could actually just mean 50kW.
I was skeptical of both of their answers, and they clearly are on the learning curve regarding EV's, and are not well informed about any part of these issues. The service tech did claim to have just come from a service training 2 weeks ago.
BUT, I let my I-Pace run down to 40%, and headed to our local Electrify America charger, and my car is now charging at 81kW! All is well. The local service people need to get up to speed, and quit needlessly freaking out customers, and be a little less sure of themselves. Heck, they did not even seem to understand that their Chargepoint DC charger Express 100 chargers at only 24kW and not 100kW. I understand I'm an early adopter here, but Jaguar really needs to clarify this issue to its dealer network.