I've got 30 tabs open today, and the oldest of them is only a few hours old.
I look down a page, see interesting links, and middle click them all. They open tabs but don't actually load until I click that tab. I close each tab after I'm done reading it, or after a few hours if I never got around to reading it and lost interest.
Is that hoarding? I don't think so. But it's the sort of workflow that TST makes pleasant but is extremely frustrating with a horizontal tab bar.