3/4 The discussions on HackerNews are not that interesting. Most of commenters compared Betula to other bookmarking solutions and approaches; this is valid, but boring. Also, people wondered what the word Betula means and whether it comes from Hebrew. No, it does not, it means Birch in Latin, my favorite tree.
I thank people who answered the questions for me. I don't have an account there.
Nevertheless, I had fun reading them and being on the front page.
4/4 Also, the Betula Nix package maintainer reported an embarrassing bug which I had to fix quickly and release a hotfix. There's never enough testing! No unit tests would've caught that...