A specific example with cars I will give... Last December, Steve & I were in the market for a newer/different used car, plus we wanted to trade in his crappy Vauxhall Tigra. He agreed that we could get an automatic for my convenience, as I still need to get my full licence over here. (I can drive a manual, but the automatic is just easier to drive -- would help me concentrate on the road better vs jiggering about with driving a manual the wrong way round backasswards, but anyway...)
When we began looking for automatic used cars, the only makes available were makes that I didn't think very highly of for reliability, etc (Vauxhall again!, Renault, Peuguot, etc -- just MO on the brand of car). If we wanted to buy a used Honda, Nissan, Volkswagon, etc (reliable makes/models IMO), we were limited to manual transmission -- no automatics appeared to be available. So we ended up buying a reliable, manual car (a Nissan Micra) rather than what we really wanted - which was a reliable, automatic car. In the US, finding & buying an automatic of most makes/models isn't an issue at all.
Apart from that, I find the blinding array of choices when shopping in the US (like at the supermarket & so forth) both awe-inspiring & frightening at the same time! I have a hard time making up my mind enough as it is, without having to choose between 100 different kinds of crackers or salad dressing!
PS - We were looking for a small car (like a Micra), not anything more luxurious & maybe the higher end do have automatics, I don't know?