In hindsight the whole 'copy nothing' line, clearly doesn't work. However I still think it rings true to a certain extent, from a standpoint that it doesn't really look like any other Jaguar before it.
I do think it has similarities to a Rolls Royce (lower front fascia), and that front also has shades of Polestar to it. And like
@Famine pointed out, it does bare a similarity to the Mercedes Vision GT (or Maybach 6 GT), in it's overall silhouette.
Having said that (and yes I'm aware I'm in a minority here), I still think it looks great, and the more I look at it, the more I really do like it. I know it's unlikely it'll ever reach production because of it being a concept, but I do hope a lot of it carries over to future Jaguar cars.
I can imagine (considering the reception it's receiving here), many will think I just have incredibly poor taste, but I'm okay with that.
I was the same when the 2023 BMW M2 was revealed, I really liked the look of that (still do), but it seemed a vast majority of the motoring world hated its styling, (saying it looked like this and that). But I honestly think a lot of those same people have warmed to it.
Well done, Jaguar.