I’ve got a Panasonic that I think I got from Costco a year ago. Not sure the model, but it says “The Genius” on it. It fails the “updatable firmware criteria” as far as I know, but it has some kind of passive food temperature sensor. There’s a button labelled “sensor reheat”, and the vast majority of the time it’s all I use.
It does a pretty damned good job of things. Frozen food will occasionally still have a cold spot, but it’s still way better than following the instructions on the package, which often results in either serious cold spots or a cheese/sauce explosion. For reheating leftovers, it’s perfect.
Edit: my partner informs me that the “keep warm” button does a really good job of making porridge for her too. Brings it up to a “just below boiling” temperature and keeps it there. She just watches it until it looks like the right consistency for her.
I use the keep warm feature on my instant pot as an alternative to a microwave. I'm not paranoid about microwaves - I just don't like constantly cleaning them.
So instead install a weight sensor and estimate based on that how long to zap stuff. There has been 0 progress in microwaves for a long time now, while many many easy improvements seem rather obvious to most people.
Personally I'd love for my microwave to have bluetooth so it'd make my phone beep when it's done.
It does a pretty damned good job of things. Frozen food will occasionally still have a cold spot, but it’s still way better than following the instructions on the package, which often results in either serious cold spots or a cheese/sauce explosion. For reheating leftovers, it’s perfect.
Edit: my partner informs me that the “keep warm” button does a really good job of making porridge for her too. Brings it up to a “just below boiling” temperature and keeps it there. She just watches it until it looks like the right consistency for her.