I'm willing to give up the LED interior lights and Park Assist, but have my list of must haves.
Park Assist... if you mean the parallel parking assist, that's part of the "Technology + Driving Assistant Package", not necessarily the Giga World trim. Park Distance Control is standard.
I think the only trim that doesn't have the interior Ambience LED lighting is Deka World.
I recently picked up a 2021 i3s BEV which replaced my 2014 BEV. Both are Tera World and I would have gone with the Giga World interior given the choice but all the production slots were spoken for so you take what you can get, right?
If you did the swap, would you do it completely? Change the door cards, armrest, all the brown trim on the dash, etc.? There's quite a lot of bits to change which always makes me cool on the idea every time I contemplate doing it!