I’m at the point where shopping for any equipment from toaster to car/home, this is the primary thing I’m looking for first before purchasing is I need to know

I’m at the point where shopping for any equipment from toaster to car/home, this is the primary thing I’m looking for first before purchasing is I need to know exactly how it works/operates. Everything is Wi-Fi enabled and smart but I need to be sold that I can operate it without connecting it. And if I can’t use the core features, the way dumb equipment would have worked, then it’s an immediate no go. I don’t care about most of the extra smart features I never had before on most things. There are a few exceptions of course. Where remote access is a major value add. Home security systems, garage doors, deadbolts, etc fall into that cohort but that’s about it so far.