That share will plummet to near 0% the moment it is transferred because people will just switch to Chromium.
The only difference between Chrome without Google and Chromium is the name and logo. You lose all integration with Google services like sync, suggestions, etc.
You'd be stuck with only the captives that can't switch because they're using older appliances with Chrome baked in.
People only know the name and logo, they dont care whos behind it.
99% of users just click that little coloured circle to open 'the internet', they know nothing past that. They will continue to download Chrome for many years to come.
The market share will drop, but slowly and over decades. That will give some greedy company plenty of time to milk it for all its worth.
The only difference between Chrome without Google and Chromium is the name and logo. You lose all integration with Google services like sync, suggestions, etc.
You'd be stuck with only the captives that can't switch because they're using older appliances with Chrome baked in.