Earlier quoted context omitted.
Even if you split the search and ads divisions into two companies, what prevents them from entering into a partnership and keep doing whatever they do now?
That's what I fail to understand in these breakup threads. They would be free to business with whoever they want. It feels like if a breakup happens it's mostly paperwork and accounting changes in practice.
That said, AT&T/Bell was broken up in 1984. The "Baby Bells" had all merged back together into 3 different companies (AT&T, Verizon, Lumen) by 2000. So there would need to be better protections in any potential breakup of Google or any other company today