The mallard reaction is very possible in microwaves, but they use microwave-specific crockery. I think the vision was possibly killed by people not wanting to maintain a second set of crockery.
See here for a fun write-up: https://www.lesswrong.com/posts/8m6AM5qtPMjgTkEeD/my-journey...
Perhaps we can liken these auxiliary advances to agents and harnesses in the analogy. In the end, despite the unbridled optimism from certain backers, we never solved the fundamental issue with microwaves: that they use electromagnetic waves for cooking, and that electromagnetic waves have certain undesirable properties for this application.
[0] https://americanhistory.si.edu/collections/object/nmah_10880...
Understand that a lot of people don't have a lot of choice but I use mine (actually have a 4 in 1 when I had to replace the old one after it burst into flames and that's somewhat useful as a second oven).
It just made me realize why I don't have those found memories of my mom's cooking. When we got our first microwave she went full on the vibe cooking and took years to realize how dumb it was.
I hope my kid doesn't get the same kind of memories about my weekend projects.