Vlad The main benefit of the "Little Arc" feature in Arc browser is that it allows for quick and easy access to a separate browsing window without disrupting the user's current workflow. This is particularly useful when users need to quickly check a website or follow a link without losing their place in their current task.
Additionally, the ability to open external links in a separate popup window can help keep the user's browsing organized and reduce clutter in the main browsing window. This can be especially useful for users who regularly work with multiple tabs and windows open simultaneously.
In the case of Orion, implementing a similar feature could provide users with a more seamless browsing experience by allowing them to quickly open external links in a separate popup window without disrupting their workflow or cluttering their main browsing window.
The best example that comes to my mind is, for example I'm using my mail app and I want to unsubscribe to an email or verify my email. In this case, it's unnecessary to go to the desktop where Orion is opened and create a new tab. It's better to interact with a small popup window without disturbing my main workspace.
I think eirk explained it better than me in his above comment.