> a good positive is most parts are durable / quality parts Exactly. Surviving parts are often high quality, due to that process of "natural" selection, and ar

> a good positive is most parts are durable / quality parts Exactly. Surviving parts are often high quality, due to that process of "natural" selection, and are just in the middle of their bathub curve. On the other side, you also do get a lot of parts with idiosyncratic or hard to diagnose deficiencies (like, RAM with a few bad bytes that you need to ignore, harddisks with bad sectors (same), CPUs and GPUs that randomly lock up, parts that work only in a certain temperature range, etc).