For what it's worth, this is actually pretty popular in Japan where they've got much more limited kitchen space and often the only cooking appliance available to people is a microwave.
It requires a lot more basting and probably a larger amount of electricity compared to what you'd be doing in a conventional oven (especially if you've got a gas oven in terms of energy costs). It's like 40 mins to do though and it turns out... not bad, though I would absolutely prefer a proper convection oven to better results at around the same amount of time.
No tool being the best tool for every job is one of my core truths (and is perhaps its own sole exception.) I think it's true for any class of tool you can think of; kitchen tools, construction or manufacturing tools, software, even ideologies (which are tools for making sense of the world.) Some tools are more versatile than others, and some are basically worthless even for their intended use. But even a tool that could be used for virtually anything (in that tool's natural domain) will never be the best tool for all of those things. I could bake a pie in a wok or make mashed potatoes with a knife; those are very versatile tools. But there are better tools for both, like pie tins and potato mashers.