Any brands protected by American law must be independently-owned, with full transfer of all branding, patents, trade secrets, intellectual assets and physical assets.
So, for example, for even a single bottle of Perrier to be sold in America, it needs to have been made by a company registered with the brand name of Perrier, with exclusive use of that name within the country, independently owned and under zero control by Nestle, being manufactured using the exact same process with the exact same ingredients, and having control of the exact same patents and American-side infrastructure.
America is such a large marketplace that it would be impossible to split a company like this. Patents alone would prevent this, forcing Nestle to divest themselves of each individual subsidiary.
I remember the days of google being a cool startup that had just made news releasing gmail with a whopping 1GB of storage making everyone go crazy for the invites. It's a strange feeling.
I worry what a broken up Adobe would do to workflows. One of the reasons I can do what I do is because Photoshop, Illustrator, After Effects and Premiere all work with each other.
Now if we want to save Behance and Frame.io, substance, Mixamo, etc, I am all for that.
I don't know how deeply their different programs integrate with each other (I don't do video or illustration seriously) but one would hope that it might encourage them to adopt more open standards and formats. For example, in my photography workflow I can import and catalogue a RAW image with Shotwell, which passes it through to my RAW developer (Rawtherapee), which in turn passes it through to my raster editor (GIMP). These programs are all developed separately from each other by people with much less resources than Adobe, so I think it's a matter of choice rather than a technical limitation.
It would depend on the actual file formats. For example I can import a live after effects file into premiere and all the updates I make will apear on premiere’s timeline, without needing to render out. The same goes for bringing photoshop or illustrator files into After Effects. I guess we’d just have to rely more on third party plugins that connect these programs like Overlord