Over the last few weeks we have been trying to build an "Intranet of Things" smart home. We have replaced many of our light switches with TP Link smart switches, for example. Critically, though, we have every smart device on a firewalled 802.11n network with NO ROUTE to the public Internet. All devices are denied access to their precious cloud.
Manufacturers do not make this easy. TP Link setup just barely works without Internet access, but it does, if you jump through some hoops.
Anyway, I think the future is going to get worse before it gets better in regards to how your information is managed, stores, and abused by companies. That's not a controversial opinion, I'm sure.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko