I used quad9 as the primary upstream DNS for my home. about 11 days ago I wasn't able to send any query to quad9, kinda blocking. Their status page was green I suspected my ip was blocked. Now I'm on quad1 :(
Thanks to multiple mentions of Mullvad in this overall post comments, I decided to replace dnsmasq with unbound and convert the laptop to DoT. Here's the specific Mullvad snippet if anyone needs:
As mentioned in the default unbound config, the "#" is not a comment when used in the value, it's used for TLS checks. I followed this simple blog post from years ago: https://www.jwillikers.com/dns-over-tls-with-unbound