I could set up pihole on my local laptop. And on my wife's laptop. And on my kids' phones. And on my work laptop. And... Or I could just set it up on one tiny

I could set up pihole on my local laptop. And on my wife's laptop. And on my kids' phones. And on my work laptop. And... Or I could just set it up on one tiny server (doesn't have to be a pi, but I happen to have one that isn't doing anything else), point my gateway at it for DNS, and give my whole family + any VPN connections filtering for free.