So do I, but the mainstream seems to be moving towards something very different.
As in: the majority of consumers seems to want maximum "comfort" (read: "ease of use and no hassle", a.k.a. "I'm lazy and dumb so I need smart appliances"), and that's what industry will provide (on pain of being marginalised and ultimately disappearing).
And guess what? Ease of use and "no hassle" means offloading lots of detailed control decisions to the manufacturer. And that means that said manufacturer has got to distinguish themselves by offering comfort and taking away decisions and cares from home-owners.
It is understood that home-owners are willing to pay for that and that manufacturers incur no penalties by offering dumb gear and putting the "intelligence" on their servers. Those decisions (blinds closed or open, heating higher or lower, anticipating the home-owner's homecoming, level of lighting, when to switch on the air conditioning, burglar alarms, suppressing false alarms cause e.g. by pets etc. etc.), still have to be taken of course. Just not by the home-owner.
Taken together this means a big fat premium on supplying dumb, (but sensor-rich) proprietary hardware, collecting as much data as possible on the habits and preferences of the home-owner, his/her family, children, pets, neighbours etc.etc., storing and analysing all that on the company's servers, and selling the resulting control information to the home-owner as a service. Look for upcoming legislation that not only allows but also compels "domestic service" companies to "share" their information with everyone from law-enforcement, insurance companies (think fire insurance, burglary insurance, health insurance (!)), medical care providing companies (think monitoring of elderly people), market research companies, advertising companies and any other interested party you can think of.
I'm pessimistic about being able to opt out, let alone to stop this kind of thing. For one thing, mass-production will drive down the price of the "mainstream" systems (whatever form they will take), thus marginalising any non-mainstream hardware. Of course manufacturers have zero interest in supplying hardware that will work without their (or another company's) service package so stand-alone or "user-controlled" hardware will come at a premium. In addition you may find that your insurance premiums are higher than without "smart home" automation.
All in all, the stable market situation will probably be a load black-box hardware that needs daily updates and tuning by proprietary off-site control software that eats your privacy for breakfast (on an ongoing daily basis).