I'd be surprised if there was a long tail of customers. There is probably a long tail of searches for most customers.
Google giving up on difficult searches and focusing on showing promoted links, AMP sites, and "rich" result boxes is probably a sound business strategy too, and is unlikely to make users switch search engines this late in the game (Bing/DDG don't seem to do better anyway).
Google giving up on difficult searches and focusing on showing promoted links, AMP sites, and "rich" result boxes is probably a sound business strategy too, and is unlikely to make users switch search engines this late in the game (Bing/DDG don't seem to do better anyway).