I think we need a better term than monopoly, that separates it from what people usually mean which is 'the best product'. I literally cannot think of any sort of product or service with lower switching costs than internet search. Typing bing.com takes 0.8 seconds and costs $0. Hundreds of orders of magnitude easier than switching to a different railroad if only one goes through your town.

Google is a big ass company and enjoys outsized market share because people choose to use it. Everyone who buys a MacBook or Surface computer or smartphone does one thing immediately and that's to download Chrome. It's literally the first thing people voluntarily choose to do after powering on the device for the first time.

I'm not sure why we need government interference here which in all likelihood would change no customer behaviour but probably just add a few extra clicks in front of the Chrome downloading process.

When Alphabet begins doing something like banning Google Fiber customers from accessing bing.com, that will be interesting. But there honestly very minimal anti-competitive behaviour like that happening at the moment.