They look cool. After all, our ancestors used knives that were not some X95cr23 kind of wondersteel and still managed to gut the deer and slice the bacon. Before that flint and chert were king, actually with even sharper edges than you can achieve with steel - the down side was that the sharp edge degraded quite rapidly. If they would have possessed the internet back then, they would have debated flint sources in the same way we contrast various super steels.

If I had to restrict myself to one blade, it would probably be a Mora or similar.