Earlier quoted context omitted.
> Just look at YouTube denying Chromium-based Edge the new redesigned experience for absolutely zero reason. The reason is almost certainly a new user agent (compared to non-Chromium Edge) that YouTube didn't expect. Chromium-based Edge is still not stable, and therefore, not properly supported by YouTube. I don't have time to test this, but I'm willing to bet that you'd get the same result by using any indie browser…
Then why did it work before? I'd been using YouTube's new layout just fine on Edge Chromium for at least a week before getting the "not supported" message.
Very happy with my Edge switch so far! And I did it before the ad blocking really reared its ugly head too.
Google needs to faceplant hard on this one.