I was a user of del.icio.us and now a VERY happy paying customer of Pinboard.

It really is an incredibly powerful tool that I use for all kinds of things (e.g. https://twitter.com/alexpotato/status/1447155166453567497)

Every time I send someone a topical/relevant link for a discussion or project I'm involved with, people always ask "How do you find this stuff?". I mention that it's primarily reading great Hacker News posts or tweets and just saving it over time.

Maciej's blog is also particularly entertaining including both funny technical and non-technical posts.