1. Bookmarks fail for medium term usage. There's some research material for a doc or PR I'm actively working on - Why bookmark, catalogue and eventually prune if I'm not going to need it past tomorrow?

2. Bookmarks don't keep page state. As more apps go the PWA route, not all of them have URIs that lead to your preferred state. Even just stuff like expanding/hide comment threads is a start, not to mention things like NPR which redirect me to the homepage if it's been too long since I last did the CMP dance.