Technology

It'd be very very bad for schools in the US in rural areas. There's no way they'd be able to afford equivalent services to what Google offers them for basically free, ever again. Many children would lose their assignments to Google Drive and others would be sad from losing what's basically a time capsule of their entire life that was stored in there.

Another loss would be Android, and the Google Play Store. So many phones would basically become waste overnight. It'd be absolutely tragic. At least that's the way I see it.

Most less technically literate folks would lose their ability to use their computers overnight. They'd go to Chrome to make a google search to go to their favorite website, and when they see the page showing that Google cannot be found, they'd just assume their computer is broken. Microsoft would be the 'saviour' in this. I'm sure they'd happily push out an update for Windows that resets your default browser to Microsoft Edge (again) and your default search engine to Bing.

Later down the road, whoever buys the old Google domains would likely be able to spread some sick malware and steal a lot of data from people who didn't prepare properly.

That's just what I can immediately think of. I'm sure there's more, or something worse I forgot about. Haha.