When dragging tabs between windows you have to be precise and drag the tab just to the left of the new tab button and then you hold and wait while OperaGX thinks before finally letting you drop the tab. Drop too early though and now you have a single tab in a new maximized window which was definitely not the intention. Allowing users to drag tabs to anywhere in the tab bar allows for easier workflows and faster actions leading to a cleaner feeling user experience. It also follows the usability seen across the other big browsers such as Chrome, Firefox, and Edge with OperaGX being the outlier and not in a great way for it's users.