Try the "Auto tab discard" extension. It allows me to have hundreds of tabs "open" and (in combination with Tree Style Tabs) largely blur the line between "browser sessions" and "bookmarks".

Far better than bookmarks.

Bookmarks do not store click history, the trajectory you took to arrive at the page. With tabs, the contexts is a backbutton away.

Yeah, agreed. The built-in tab discarder only kicks in when there's actual memory pressure, so can sometimes be a bit precarious. Auto tab discard happens way before that, so tends not to be affected in the same way. I guess it uses more i/o in total, but it's not noticeable on a system with a fast-ish SSD.

It can still be a bit iffy when memory's really tight, but even then a simple tab reload is usually enough to fix things.