"defined their product category" means it used to be outstanding, not that it currently is outstanding.
"among the most popular" doesn't need either of those to be true.
As a concrete example, Windows defined the product category. And it is still the most popular desktop operating system in the world by far.
Few here would argue that it’s an outstanding product.
As a concrete example, Windows defined the product category. And it is still the most popular desktop operating system in the world by far.
Few here would argue that it’s an outstanding product.