Earlier quoted context omitted.
My understanding is that chromium can't be run on Windows or Mac. Chrome Canary or some testing variant can but not Chromium. It's hard to consider it a mainstream option in that case for me. EDIT: this is untrue, chromium builds are available for all platforms from chromium.org. Please ignore
>can't be run on windows I'm not sure exactly what you mean by that. chromium.org doesn't offer chroimium builds on their website but there are a number of places you can get someone elses build, for example https://chromium.woolyss.com/ or https://github.com/macchrome/winchrome/tree/master or presumably just build it yourself if you wanted to.
(Disclosure: I work at Google on Chrome.)