It was the default on the Mac and it’s nowhere near the most popular there.
Google pushes Chrome HARD.
Google pushes Chrome HARD.
Also, it's wise to not underestimate the power of developers ceasing to test against non-Blink browsers and taking a page from their IE-era past selves with "Best Viewed in Chrome" and "Browser outdated! Download Chrome" badges. There are few user motivators stronger than things not working.
As far as I can see there are only two possibilities on any kind of near term:
Apple can lock Google and everyone else out, or Google can take over the web fully.
Those appear to be our only choices right now. I don’t like either one. But I know which one I don’t like more.