Why would we define a "good product" as a "successful product"? These are 2 different things. There are many ways to define a "good product" (is it useful? is it well made? is it innovative?), success is something else. All combinations of good-bad / successful-unsuccessful are possible.
Compared to what?
> abject failure
Applying this to apple is beyond comprehension... What do you mean by using such a term? Apple is likely the richest single entity to have every existed, outside of perhaps the US economy as a whole. This single vr product line made apple more money than either of us will make in a lifetime. So hopefully i'm mistaken and you can educate me as to what the word means.
But hopefully you meant "objective". Which is still stupid, but is at least a familiar and manageable form of stupidity.