Yahoo has a huge number of services that remained popular with different groups of people well after they should have gone to dot.com hell - yahoo groups,answer

Yahoo has a huge number of services that remained popular with different groups of people well after they should have gone to dot.com hell - yahoo groups,answers, finance etc. I attribute their neglect to poor management and misplaced priorities. Yahoo could have been quora, instagram, pinterest etc. even well after those upstarts arrived on the scene.