I've always been excited about stuff like motorized blinds, and being able to control them remotely would be cool, but I have likewise touched none of the commercial IOT stuff, not even the more generic stuff unless I could put a custom firmware on it.
I also will probably never trust a digital lock until they are known to be the most reliable and hassle-free option, which I assume will be never at this rate.
But, if you did want to play around with some stuff, there are non-corporate devices that don't have privacy issues and there's Home Assistant, a software package/OS if you want it that does all the home stuff. There's a learning curve going that way for sure, but what form of Freedom does not require something from you?