The Cayenne is one of the only SUVs I looked at where the sales experience made me more interested in the brand & left me with a good impression of the dealer.

I hadn't seriously considered a Porsche until I learned they make niche parts for cars for decades - like interior bits and trim that most brands stop making/carrying after about 10 years. You can get parts for a 2002-2016 Cayenne at the dealer, but even though it shares a TON of components with the 2002-2016 Touareg you won't be able to get the parts from VW that you can still source from Porsche for those same years.

They even make retrofit CarPlay head units designed to fit in their classic cars both physically and design-wise https://9to5mac.com/2020/04/23/porsche-carplay-classic-head-...

Well, for most other >10 year old cars, if all else fails you would be able to get parts scavenged from the junkyard, but I guess that doesn't work as well for Porsche (first because there's not a lot of them and second because they tend to be used longer).

This is true, but it seems a lot of the manufacturers stop making interior parts, trim, electronics, etc. for cars older than 8-10 years.

Need a seat, mirror, air conditioner vent trim, logo for your trunk, floormats? No luck with most manufacturer... and these are the kind of parts the 3rd party supplier market doesn't even attempt to do.

I still have a warranty (factory) on my other German car, but even though it is only 7 years old they do not stock or make a replacement for the hybrid battery. So even though it failed and is under warranty, the manufacturer cannot fix it. This has been ongoing over 11 months now; apparently it wouldn't happen with Porsche

as exemplified by this commercial: https://www.youtube.com/watch?v=R8-9oIq1hxw

It is like that with a lot of brands tbh. Some dealers specialize more in the parts market and have their own sites or ebay stores. In my experience with acura the same is true where you could get 20 year old random parts.

The only time I went into a Porsche dealership was when I was shopping for a BEV and wanted to check out the Taycan. I was able to test drive it, but then the dealership put on a hard sell. I wasn't convinced the vehicle was worth the money; they thought marital advice was the appropriate counter-message. No thanks.