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My ancient crockpot has reached a point of needing to be replaced. I no longer trust it to be left home alone while operating which, for me, is the entire point of having it. It's developed a condition where the outside of the unit gets as hot as the inside, you can't touch it for more than a quick second when running on "high". I'm considering the Instant Pot as the replacement because the pressure cooker I have is ancient as well so I could replace both with one device. I have no interest in the "Smart Bluetooth" model so I guess my question is, are there any good reasons for me to pay the additional $70 for the Ultra over the Duo 6 quart? The Duo is already considerably more costly than a new slow cooker so I'm not looking to go higher than that unless there are some really solid reasons why I should.

Edit: I'm sure this question has been answered many times but I'm not willing to read through hundreds of pages trying to find it. Apologies for my laziness.