Quick-fire questions
Why does my Mac’s computer name change?
> This can happen when a Mac thinks it can see another Mac using the same name, so changes its own to avoid the conflict. Some versions of macOS are prone to this, and may do it when renewing a DHCP lease with a router. Correct the name in the Sharing pane if it bothers you.
Is it worth limiting IP address tracking?
> This depends on whether you have an iCloud+ account. Without that, it tries to hide your IP address from known online trackers loaded by websites, which is helpful. With iCloud+, though, you can enable iCloud Private Relay, which works much better and covers websites as well as known trackers.