There is an interesting effect noted, I think, by Consumer Reports many years ago--
One person loves their car. Yes, it had a bad fuel pump that left them stranded, and was in the shop twice to have carb adjustments, but it is great car, worth ever penny...
Another person considers the car unreliable junk. It left them stranded with a failed fuel pump, and was in the shop numerous time for carb repairs.....
Personally I'd put the cut at "limp along" failures vs. "toes up in the field" failures. Limping along is OK (I used to drive a truck with rusted out floors, bullet dual exhaust (sorta. Only a few holes in the pass pipe patched with tin cans), broken rear spring stacks (crummy GM parts, horrible metallurgy), couple of round cam lobes in the 350 (typical GM of that era), and driver door held shut with a bungee (watch the right turns, the driver door swings open on the bungee, try not to smack any passers by or sign posts (passenger door rusted shut, afraid to open it, truck might break in half)). [and THIS PASSES INSPECTION surprisingly enough. At least in NY. Clutch finally wore out and I stopped driving it, bought an F350 after driving an F150 with no idle hot oil pressure in the 5L block (what a good block!)-- I drove this one for 3.5 years every creeping hot construction zone an adventure, leaking 1/2 quart a day of 20W50 from the front main

finally had to give it away due to working 24x7 for a year, no time even for limp along maintenance.]).