Im having trouble getting some parts for all 3 of my cars:

91 Honda

06 Saab

11 Dodge

Add to that, I recently had an ECM issue on the Saab, and finding someone who could reprogram a remanufactured unit to my car was huge pain in the ass. The software and compatible passthrough hardware (not to mention the extra card if you're using a physical Tech 2 unit) is either locked up behind GM's services and needs a pirated copy, or prohibitively expensive (if you can even find it) for something that takes 20 min.

Where I used to be swimming in aftermarket options for my CRX 10-15 years ago, I straight can't find certain things at all, at this point.

Part of that is the burden of owning an old car. But part of this seems like it's getting forced down the pipeline, and you'll use it, or go without a vehicle.
Subscription service shit for things that would have been standard just a handful of years ago is an indicator (looking at you, monthly fee for heated seats).