Our whole paradigm is wrong. We suffer from chronic cultural poverty. We lack self awareness. It's a clown show. Software was supposed to be modular and reusable. It's not. The reasons are not technical, it's us. We're exploited dummies.
Indeed. I use both Unbound and NSD quite heavily as do at least four of the Internet's root DNS servers. I use it for some of my authoritative DNS servers.
Unbound is used by many on HN that block ads and malicious sites on their home router.