Why do so few people use Chromium? (I use Firefox for most stuff, but I prefer the debugger in Chrome / Chromium).
Years ago, I started using Chrome instead of Chromium or Firefox because they made Flash work out of the box on Linux. Although Flash is not important for me anymore, I just never looked back.
With all this new strange Sync and Log-in behavior, I'll might change to a different browser.
Those activities aren't mutually exclusive, especially when first one can help the second (example: Win10 telemetry).