We tried the, "One company makes everything in your house," thing in the mid-century, and it didn't work. A home is an ecosystem - not the corpo buzzword that actually means "walled garden", but an actual ecosystem, with a diverse set of (often competing) "organisms" coexisting. An average room needs seating, storage, entertainment, and its contents are highly influenced by culture, lifestyle, memory, family, desire/ambition. Smart home products have become better over time as manufacturers realized that any given room is going to be a chaotic mix of other manufacturers' products, including those of competitors, and that the only way for the entire ecosystem to succeed is for all of the parts to play as nice together with each other as possible.

I feel like this is one of Apple's weaknesses. The AVP was a massive indication that they're not ready for that kind of paradigm, because even within their own product, apps (organisms) that should have been able to exist as complete digital "objects" and interact with others were instead siloed off experiences that took over the whole device.