If tomorrow Google turns next-level evil in terms of privacy / steering the web, Microsoft will have forked Chromium within a week, and everyone (Edge, Brave, Vivaldi, etc) will swap their upstream immediately.
People have this illusion that Google has an ironclad grip on Chromium, but they don’t. It’s maximally permissively licensed, the only reason they get to decide much is because they put in (pay) the dev hours.