There are network effects and other feedback loops that make competition not possible. For example, by simply having fewer users, you get less information to tr

There are network effects and other feedback loops that make competition not possible. For example, by simply having fewer users, you get less information to train your algorithms. But in Google‘s case, they also have the network effect of running an advertising platform. This platform is hard to compete against in itself. And it provides funding that would otherwise potentially go to other players so that they can invest in search quality. Just a thought. I have not thought deeply about this so I would welcome other opinions.