I like my Denon Heos setup: 2 TVs, home theater, receiver in my office connected to my computer and speakers in 7 other locations. Works great with Music Assistant, and doesn’t require a cloud connection. It can pull firmware updates if you want but I’ve blocked all Internet access for those devices with no loss of functionality.

The problem would be getting it back out. The post only says 1 teleport, nothing about getting home again.