The worst part is that even if you buy your own spare separately, many of the cars had no designated place to put it, so it would eat up usable cargo space. Since I was looking at wagons, I didn’t want anything taking up space I needed for other purposes. One of the cars I compared was another hybrid, that not only didn’t have a spare, but put the hybrid batteries in the cargo area. So when the dealer showed me “how convenient it would be to put a tire in the cargo area” there was maybe enough space left to put my handbag in the back, and that was it. I am sure I gave that guy a look like he had two heads or something when he did that.
He even tried to tell me that I wouldn’t need to have the tire in there all the time! What?!?
IME, male car sales reps will say all kinds of really outrageous things to female buyers; stuff that is obvious nonsense, possibly designed to test how ignorant we are. The thing is, a lot of us (and if raised in the South, especially), were raised to think that it isn't polite to call BS on a stranger, so we tend not to actually call them on it -- we just walk. It amazes me that the dealership world doesn't seem to have caught on to this yet.
I bought a new car (an Outback) in 2019, thank goodness, and what I noticed was different from when I bought the previous one 10 years before that is that storage spaces of all kinds seem to be disappearing or getting smaller. Even the little pockets for loose change are gone from most vehicles.
OP, one thing to consider if you switch to a luxury brand is how much "softer" the ride is going to be. I tended to buy stripped-down models most of my life for cost reasons, and now that that isn't such a problem, I have added a few nice options that I just plain like; including nicer seats. However, the one thing I cannot get used to is really marshmallow-y suspension. As a driver, I really like to feel a solid connection between myself and the road, and IME you lose that with really soft suspension, so for me, true luxury brands are a no-go.
Also, be aware that some cars, especially SUV's, can have an undermount storage bracket for a spare. It's a bracket behind the rear bumper that holds the tire flat under the gas tank. My previous car, a Hyundai Santa Fe, had one of those, and so does my DS' Hyundai Elantra hatchback.
PS: The last 3 flats I've had, including 1 on a rental car with low-profile tires, were not reparable. DH has had the same experience with the low-profile tires on his Acura. Not because we ran on them flat (we didn't), but because the damage was on the sidewall. We both now carry battery-powered inflators to use to keep slow leaks topped-up until we can reach a repair shop.