It's great for streaming raw vegetables. Put in plastic bag and nuke for 60s followed by 10s at a time till just steamed

If you want a scrambled egg patty for like a breakfast sandwich or something, the microwave is fine. Beat the egg, add a splash of water to lighten it up, and then dump it into a container with a diameter that matches your desired sandwich size.

Microwave until patty is cooked. It's fine, tastes like egg, has the appropriate texture.

You already mentioned them but potatoes are damn decent if you don't want to take 40+ minutes to oven bake one. Also I find it hard to balance crisping the outside while not turning the inside to mush in an oven. Microwaved potato skin doesn't crisp but it stays soft and very easy to cut through.

I'm also guilty of using it to defrost meat when I forget to thaw it overnight.

I use a combination of my microwave and air fryer a lot. Especially for reheating. When I want something to be hot, but also crispy on the outside, like pizza or burritos, I usually throw it in the mee-crow-wav-ay for a minute or 2 and then in the air fryer to finish it off. Works great for reheating things that have been fried. My latest tonkatsu and curry binge, I reheated the chicken this way a lot.

I preheat grilled cheese sandwiches in the microwave. The cheese is almost melted, then I put it in a hot pan and fry up the bread.

Mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

I have a microwave vegetable steamer. Good results every time.