Perhaps obvious was not a good choice. Anyways:
I would say Google is as close to a natural monopoly as the Bell System was in 1956. If you came to me and said “Hey, I want to start a company to compete with Google in search,” I would say you’re out of your mind and don’t waste your energy or your time or your money, there’s just no way. Classic economics would say that if there’s a business in which there are 35 percent net margins, that would attract a huge amount of new capital to capture some of that, and none of that has happened. That tells you there’s something wrong.
From: https://promarket.org/google-close-natural-monopoly-bell-sys...
Water companies are a utility because there's a high cost to laying the pipes and the more pipes you lay, the more people you service, the more pipes you can afford to lay. It's near impossible for an upstart water company to come in and displace the incumbent.
Search companies should be a utility because there's a high cost to gathering the data needed to drive good results and the more data you gather, the better results you give, the more data you gather. It's near impossible for an upstart search company to come in and displace the incumbent.