I use a mostly flat structure and rely on tags to categorize my bookmarks. Usually if the info is somewhat important to me, I'll copy the snippet I need into a

I use a mostly flat structure and rely on tags to categorize my bookmarks. Usually if the info is somewhat important to me, I'll copy the snippet I need into a notebook (Joplin, I use tags there as well), and also send a request to archive the page on the Wayback Machine as a safeguard, so I can search that URL there later on if needed. The hardest part is to categorize and tag the content correctly so that you don't spend a lot of time searching.