Edit: so I just looked and it turns out you can enable tab bar scrolling on chrome://flags/#scrollable-tabstrip. Why is that even disabled by default?
What do you lose from closing tabs versus what do you gain from keeping them open? For me, if I use a site open it’s bookmarked or already in history so it’s fast to reopen. Closing tabs keeps my machine fast and memory usage low and also makes me faster at switching between the open tabs as I don’t need to search or parse through many UI bits.
One is as a sort of ad-hoc to-do list. When I leave a tab open it's because something is unfinished and I mean to come back to it soon. (I just wish there was a chronological view so that I could easily delete the oldest tabs).
The second purpose is to store the scroll position of longer articles that I haven't finished reading.