I agree with what a lot of others have said about aesthetics, but there's another point to consider as well: performance.
Traditionals are just plain better than a lot of moderns at doing everyday carry type chores. They have thinner blades with less behind the edge, so they slice better, and steels like 1095 and 440c are easier to strop and/or sharpen to get to a razor edge.
The other realization I think a lot of people have is that no folding knife, however "overbuilt," can compare to a fixed blade for hard use. Sure, you can thump on a Strider or Hinderer, but there are a ton of parts to wear or outright fail no matter how overbuilt they are. Why not get a good Bark River for half the price? You're getting better quality for less, and theoretically it SHOULD fit your POU better. Of course, the majority of people who buy overbuilt knives are just using them for EDC, which they are not well suited for.
I think the magic combination is a well-ground traditional (or modern that works like a traditional, like a Mnandi) for EDC tasks, and a smallish fixed blade for hard use. I don't carry my fixed blades every day and they usually ride in a bag instead of on my person, but that combination works fine for me.