Big shout-out to Pinboard.in! (Pinboard's creator acquired del.icio.us in 2017[^2])
I haven't worried much about bookmark managers in 2+ years, thanks to Pinboard features[^1] like:
* Import and Auto-Sync
* Tags and Bundles
* Tab Sets
* Notes
* Quick Edit
* API and outside services
* Feeds, Badges, and Widgets