They just plain don't like you McRat
I can understand them delaying you to July, to prevent selling you the 200,001 car at the end of June ... but at 5,000 a week they ought to be able to make one for you soon after that. I'm fairly sure you are not holding out for the cooking-version, and instead want the full-fat, high-profit, ones that Tesla are keen to sell first ... unless you are in one of those states that hates car companies with no dealer network?
Only thing about the Jag that bothers me is the 20K units p.a. worldwide build numbers, and 20K units going to Waymo in the first 3 years. (Dunno reason, but I assume battery availability constraint)
I've never owned a Jag, but I know lots of people who do, and they love Jags. I don't know the reason for that either, but (for those type of Brits) I reckon the choice of options, and feeling like you have a bespoke vehicle, is a significant thing. Looks nice, good coach building, long heritage ...
The i-Pace is not for me because, currently, the UK non-Tesla charger network is dire and I drive out-of-range often enough, but for anyone in UK who doesn't I think its a cracker.
Its bound to be a runaway success IMHO. Except that if it is then the 20K units p.a. is going to then disappoint a lot of people. Jag don't even appear to be doing "Most profitable model first", and I hear lots of people saying "My dealer says I can have one" ... seems like a disconnect there ...
Maybe 20K units is just a guesstimate, and they can ramp up, in which case hats-off to them and their customers