I bet it is a great browser, but I did not get the same feel as the old opera at the time when I tried, too many features missing back then.

Moreover, not using chromium-based browsers is a kind of matter of principle for me. Chromium has been a monopoly for very long, which gives google too much power on how people may experience the web. This was made especially apparent with the manifest 2 -> 3 transition, but it should have been seen as a concern imo since a good while back.