All products have tradeoffs, and for different consumers, the tradeoffs will vary. Some people prefer the most popular web browser because it is the one which will work at the greatest number of web sites. Others prefer a less popular browser because it has features the popular one does not. This allows the less popular browser to continue to exist even though the most popular one is better in some ways. The fact that multiple products exist doesn't prove that the less popular ones are better in general, merely that they are better for some people.