The problem with just bookmarking is link rot, I've had a few links 404 or the domain disappear - instead I use wallabag (imperfect but good enough) to pull in the content for another day
That being said, in the spirit of my comment — I honestly don't care too much about what I might be missing due to sites going down etc. anymore. The truly great stuff I save somewhere offline, but that's one or two levels past all the random things I currently use bookmarks for.