Rhetorical question of course. With an open tab I have that information and can go back and forth up the path. Its very useful context to have when I revisit the tab. In my line of work I research many things every day. Firefox open tabs have been a godsend. I literally have 900 to 1200 open at any given time
Photoshop has work flow like this - you can split the undo history into a tree like structure (to a degree, it's not infinite).