This is wrong. One of the three major pieces of this case is the allegation that Google has hindered those who wish to fork by preventing them from making phones with any of the major phone OEMs:
"In particular, Google ... has prevented manufacturers wishing to pre-install Google apps from selling even a single smart mobile device running on alternative versions of Android that were not approved by Google (so-called 'Android forks')."
The allegation is that because of this, anyone looking to fork Android had a very hard time finding good OEMs to make their phones. E.g., maybe the Amazon fire phones would have worked if they could have gotten a Tier 1 OEM to make the phones so they could have put out a better product. But nobody would agree to stop making all of their current Android phones to see (I assume; there is no public version of the decision yet so I'm making up the example).
I guess looking forward the writing is on the wall that Samsung will eventually move to its own OS. An the 'anti-fork' attempts will eventually get beaten down by litigation.
So really a proprietary OS on your own hardware like Apple would be the way to go. No surprise that Android apps will work on ChromeOS going forward, I'm sure they'd work seamlessly on Fuchsia too (don't they already?).
Maybe in a few years this comment will look quite prescient. Or I'll look like a dumbass. I'd say 25/75
Brave it's superior to Chrome
Nine/Aquamail is superior to Gmail
Poweramp/Retro etc it's superior to whatever Google has
just for categories you mentioned