My parents’ isp setup a static dhcp entry per customer. If you change the mac address of your router you don’t get an address. The address you get with the proper mac address is constant and can’t be changed.

Also trains the next generation to think these kinds of privacy violations are ok, when they are not.

could use nextcloud with s3, might work for what you need.

I have a 2018 car and the android auto on it doesn’t seem to be compatible with the android auto on phones anymore. It worked fine for a few years, but not anymore. I highly doubt they release a software update for it to make it compatible again.