However, one important usability feature is missing: horizontal tab scrolling when many tabs are open.
This feature already exists in other Opera browsers, and its absence in GX creates an inconsistency within the Opera ecosystem.

For power users, relying only on tab islands or the sidebar changes natural tab navigation behavior.
An optional setting to enable tab scrolling in Opera GX (even disabled by default) would greatly improve usability without affecting performance or animations.

I hope you will consider adding this feature in future updates.