Google exiting the market for 3 months would have enormous economic impact, in a bad way. They're too integrated into the economy to "just" close them out of the economy for 3 months.
The world could tolerate YouTube being gone for a while.
What about Android though? Is the entire world supposed to replace their phone while Play Services are down, and Android isn't getting security updates?
What about GCP? How many businesses are also going to be shut down when GCP suddenly stops working? They might migrate, but that's not something you can do overnight.
What about Gmail? Email communications would be shattered for a while, since so many people will need a new email provider and will have to distribute that out. God forbid anyone forgot their password and can't reset it because Gmail doesn't work.
What about G Suite? Do all these other businesses just suddenly lose access to their documents? That would royally screw a lot of businesses.
You can't "just" shut down Google without a whole host of second-order effects.