Do you want a crockpot that has to be replaced at every few years—or at least that will be forever upgrading itself? Would apps change your mind?
When enough others decide to buy an app-able crockpot, you won't have any choice but too buy one as well. The market does not provide what people want -- it provides what is profitable.
Yea, not so much. I can still buy a "dumb" cellphone, that won't do much besides voice and SMS, and they are easy to find and significantly less expensive, despite the fact that "most" people buy smart phones. I can also find solid keyboards without "Windows" keys, wood-burning stoves, stove-top percolating coffee makers, and while everyone makes fun of buggy-whip manufacturers losing jobs, the producers of buggy whips and horse-drawn carriages are still meeting the demand for those products, even though it is rather small. I think you would be surprised at the music available in vinyl formats.
Your premise is correct, the market provides what is profitable. But one way businesses can be profitable is finding a "niche" market that no one else is adequately serving. And a crockpot with an analog switch will always be cheaper to produce than one with a networked, embedded controller chip, so it will always be profitable to produce them, even for a tiny market.
Note that this dynamic will never be true in a government-led command economy. Consumers lose choice when government bureaucrats decide they don't need something, or, just as bad, decide to ban companies from being allowed to sell them.