If you don't think Craigslist has an insanely strong network effect, you haven't been thinking about this long/hard enough. Why do you think it's one of the very few websites those people interact with? It's not just because it's simple (though that helps a lot). It's that a) everyone uses it and b) it has everything you could want. It means you don't have to remember 50 random websites, one for each vertical.
I may be in the minority in Silicon Valley, but I'm honestly a really big fan of Craigslist, even despite their C&D'ing me, and I don't think it could or should be "disrupted". I think it's perfect for most of the things on there: lightning fast, few restrictions, community driven. I think it's massively better than that other alternative of having a ton of small websites that each do one thing well, but differently. I shop for new stuff almost exclusively via Amazon for the same reason that I shop exclusively on CL for used stuff.
I may be in the minority in Silicon Valley, but I'm honestly a really big fan of Craigslist, even despite their C&D'ing me, and I don't think it could or should be "disrupted". I think it's perfect for most of the things on there: lightning fast, few restrictions, community driven. I think it's massively better than that other alternative of having a ton of small websites that each do one thing well, but differently. I shop for new stuff almost exclusively via Amazon for the same reason that I shop exclusively on CL for used stuff.