Who is this for? This seems to have been designed by people who would never, ever have more than the minimum number of tabs open that think it would be helpful to people completely unlike themselves. This is the fever dream of an OCD person trying to "fix" the life of someone who is the polar opposite. This is equating messy with disorganized. Messy can be organized in a way others just can't understand. I don't think there are more than a handful of people in the world who would actually use this feature.
In my experience, the worst thing you could do to someone who routinely keeps a bunch of tabs open is to reorder them when they aren't looking. Nothing would be where they think it is, and they would spend more time looking for it than if it was just left alone. It's like the person with a messy desk which drives OCD people insane, but they know where everything is. Cleaning it up would massively reduce their productivity as they spend a lot more time looking for things they think are where they usually left them, or just ignoring projects that are no longer have a reminder in their sight. It's just how some brains work, completely in contrast to an OCD person who can't work at all unless the desk is completely clean and ordered.
I know this because I am one. I tried to reform, cleaned my desk at home and was diligent for 3 months about putting everything away immediately after using it. It was the least productive and miserable 3 months of my life, so many projects never got touched, and I wasn't even doing the fun stuff I normally did. I pulled everything back out and I was happy and useful again. I routinely keep dozens of tabs open. They do not need to be reordered. I might have 3-4 pages of the same website open, each next to pages from other sites with the same relevant-to-me subject, there's no way their AI would either be able to determine subjects correctly or group it in any logical-to-me order better than it already is.