They will probably make cuts along market segments, along horizontal integrations, along prior M&A; they will probably also, as in the Bell case, cut geographic

They will probably make cuts along market segments, along horizontal integrations, along prior M&A; they will probably also, as in the Bell case, cut geographically. The main obvious cuts for Google and Amazon are to fully split up the technical infrastructure and Web hosting technologies from the consumer marketplaces. For Google, they would force Alphabet to spin off Google Cloud along with Google's own datacenters into a new datacenter host, and force Google/Alphabet to purchase hosting services at arms' length. Similarly, Amazon would be forced to be fully at arms' length with AWS. As an aside, Facebook could not be directly split up in this direction, but instead regulators would probably choose to unwind their M&A spree of the past decade, in particular spinning off Instagram and WhatsApp. Your question now can be reframed: What stops Alphabet from becoming big anyway? Nothing, really, aside from the same regulators that have the responsibility of splitting them up right now. Nothing short of legislative action will work, after a certain point.