Chromium is open source, not "Google", since all the bits that make it Google are in Chrome.

Not even the creators of the browser think that it is ready to use, inplying it is unusable. So it is immediately disqualified.

Like what the sibling comment said: [0] Until it has achieved feature parity with at least Safari, then you can talk about 'value' or realistically using this browser over a Chromium one.

I can use a Chromium-derived browser today like Brave or ungoogled-chromium and have no 'Google' in it. The SerenityOS browser doesn't even qualify to be compared with the rest on usability other than being 'built from scratch'.

[0] https://news.ycombinator.com/item?id=31165497