It costs cloudflare basically nothing to host free customers ( if you start to push real traffic you will get an instant call from sales). By being a free customer you are basically a guinea pig for all new features as they are rolled out globally.
Kal-El, No!
I like that they incorporated a flared base
https://wiki.debian.org/AptConfiguration#Using_pinning
The company I work for has a apt repo that both has some tools I like to install, but also maintains super new versions of certain libraries and kernels with configs that would break my laptop.
So I have the priority set low enough that if a package exists in any other repo it it preferred over my companies version.
Also sorry for the slow reply I forgot to check my messages 😄
You can set packages from a particular repo to a lower priority so that they are only installed when you expressly ask for them
I’ve been running sid on my personal laptops for more than a decade. Can’t imagine doing anything else