I'm talking less about gear that doesn't fit, or is uncomfortable, and more about gear that just... works differently. My S190s aren't "bad" skates, and while they aren't as comfortable as my AS1s I can wear them for two or three skates a day without issue, but my AS1s feel and play differently. In a way that, I feel, has immediately improved my game.
Kinda like how some goalies love or hate particular glove breaks. A glove can be perfectly sized and comfortable when you're wearing it, but how it plays is another matter entirely.