@duckling5746@lemmy.today as a reminder the reason this is related to self-hosting should be obvious, whether in the title or the post text.
For this one, I'll note that this is key to self-hosting, and I think many know it. Many, myself included, use f-droid or similar 3rd party repos to manage the apps that we use with our self-hosted setup. With this change, many of the current apps we enjoy using will either need to register with Google, or essentially become unused. While there is a way to still do it, it is really messy, and requires an absolutely wild number of steps + 24hr "cooling off period". Its ridiculous.
Personally, I'm leaving the android ecosystem one way or the other. It may be using an android phone and hotspotting for another device running PMOS or similar, or getting a Moto with Graphene, whatever, but this change is impactful and horrendous.