It really depends on what you use a microwave oven for. If all you do with it is thaw and reheat, yes, with a little planning you can do without one.
I have never understood why people buy an expensive appliance and use it such paltry ways. I use mine constantly. Yes, I do all the reheating, thawing and popcorn popping* everybody does, but I also use mine for cooking.
It does take some time and trouble to learn the nuances of your particular microwave oven -- the learning curve is steeper than with conventional stoves, but I find the savings in time and trouble to be worthwhile. (I should mention that I have a two-person household and a very slow-to-heat electric stove.)
My microwave is indispensable for making
bacon and vegetables. I also use it regularly for steaming fish and chicken breasts and melting butter, chocolate and cheese.
Microwave risotto is a regular thing in our house, too. (No, it doesn't come out as perfectly as the kind you make by standing over the stove stirring and stirring, but we would have risotto a whole lot less often if we only made conventional risotto, and we love risotto.)
Other things I make in the microwave:
Soup
Eggs
Pot roast
Shrimp
Sauces
Fudge
Cooked fruit
There are probably more, but I use it so reflexively that I don't even think about it. It's often only in play for a portion of a dish. For example, I will sometimes partly cook potatoes in the microwave and then finish them in the toaster oven.
It isn't the best tool for everything. I recently watched somebody cook a turkey in a microwave, and although it came out much better than I'd have expected, the process was so fussy that I can't imagine how anyone would find the time savings worthwhile unless they didn't have a regular oven.
Yet what it does well, it does extremely well. I'm always finding new things to cook in it. I bought
Barbara Kafka's "Microwave Gourmet" when it first came out and never looked back.
*You don't need to buy microwave popcorn. Regular popcorn pops fine.