> Second, my email address also disappears. Third, all the IoT devices that use services on this domain become bricks. Basically, I disappear from the Internet.

While changing email is inconvenient, I don't understand the point about IoT devices. IoT devices should not depend on the Internet at all for obvious privacy and security reasons. If you are using IoT devices with "cloud" accounts, then this is a blessing in disguise. Put that garbage in the trash and rebuild around HomeAssistant, Zigbee, RTSP, etc. I find it hard to believe that someone hosting their own website would fall for the cloud IoT scam.