I'd shop A8 vs 7 series vs S-Class and others if I had a driver and cared about getting from A to B in maximum comfort , quietness and isolation from the outside world. However I'd get the P85D because it's a supercar in a family sedan disguise and is a solution to almost everything I dislike about an ICE car ownership, e.g. buying at a dealership, servicing at a dealership, having to visit gas stations with dirty nozzles, noise, fumes, gear shifts, warm ups, feeling guilty about "smoking" someone on the road, and so on and so forth. Disclaimer: I've driven a Tesla (but never an A8 or 7 series, I suppose they are close to Lexus LS in nature). If I had the cash I wouldn't look at anything else at this point of my life, because frankly there is nothing comparable. Oh, and had I had so much money I could always rent a full size sedan for cross country journeys.