This invention surfaces every five years or so. Obviously never goes anywhere. I bet the creators are well aware of this and they just want to bait a dumb enough VC to exit with a load of cash.

Not the person you asked, but also a nextdns user: I have a light (in terms of blocking) profile on my router (set up via a DoH address, but DoT and traditional DNS are also possible). Then I have a much more strict profile I use just for my phone and laptop with more serious blocking, including porn filters (recovering addict). I set these up per-device, but later I learned I can do it in Tailscale (which I did).

Maybe you want to, or even have to talk to people who don’t use fedi apps.