I don’t think the mega corps invented any of their smart home stuff. They acquired small companies that made good products then tore them to shreds to mine data and sell advertising which is how they make money.
Like, building to a profitable SMB then exiting is essentially what this site (ycombinator) is all about.
The local cafe is now a Starbucks, your bank is now part of JPM, your favorite utility software just got acquired and killed because there’s no way to show you ads on it.