How is that both ways? Sony made the same "mistake" as Microsoft made for their 3rd gen machine.Talking perspective, I guess it goes both ways?
Sony had to use its PS3 to push a very expensive new device (Blu Ray), its new processor co-developped with IBM and Toshiba that MS coopted in parts (for the central core) thanks to a very shady IBM deal, and came out a whole year later, while facing a massive Software juggernaut like Microsoft with a deep knowledge of Online architectures (and extremely deep pockets).
However, PS3 had a potential 120 million or so PS2 fans more or less waiting to upgrade whereas MS had "only" 20-30 million (i dont remember the exact number, think it was closer to 30 million).
So for that generation, MS increased userbase while Sony lowered theirs if we would compare apples to apples.
Then Sony gained back many of those lost and MS lost many...
But yeah, nothing of what you said contradicts what I said, I think.