While I'd happily support regulating tethering as well, because it'd certainly make some things easier, with a little bit of thought you can build out home automation where it's all under your control. E.g. stick to zigbee and z-wave devices as the default, and get dumb zigbee and z-wave USB dongles, and connect them to an open source bridge, like Home Assistant, and you've got a good start.
Most of the above is Zigbee, which is open, but some is Tado and Lightwave, and if they go rogue it'd suck to replace the devices rather than just the hubs.