Gaydon era AMs (DB9 and onward) are actually quite reliable. I’ve had mine for 12 years and other than consumables (oil, filters, fuel, brake pads, etc) I have only ever had one issue - the clock wouldn’t reset after adjustment which required a software reboot essentially and I also replaced the gas struts that hold the doors open because they were losing strength and the doors wouldn’t stay open. Other than that, nothing. I do almost all the service myself so it costs me less than $200 /year in maintenance on average.
I’m on an a couple Aston owners’ boards and that’s pretty typical. They’re pretty simple cars and well built.
But anyway, Fisker was the designer of these cars, and not responsible for the car’s engineering development.
My 90s Ferrari on the other hand has DEFINITELY earned its reputation for being an MX hog.