Frozen Mammoth meat edible

I read this list a while back that claims ancient animals frozen in permafrost in the (Siberian?) tundra were eaten by scientists.

Number 1 on the "Foods edible after an incredible length of time":

Quote:

That’s not a typo. People have actually eaten food older than most of humanity itself. If you’re wondering which magical animals have flesh edible after such a length of time, we hate to disappoint you by not answering, “Unicorns.” But we’ll try to make up for that disappointment by answering with: “Extinct ones.”Mammoth corpses can and have been found with plenty of meat on their bones, due to the bodies lying in areas covered in permafrost. Some of this flesh is indeed edible. Many unconfirmed but interesting stories tell of hungry explorers, usually Russian ones, taking bites out of mammoth corpses. We also have some confirmed cases of people eating food tens of thousands of years old. Like the paleontologists who cooked and ate a dish made with the marrow of a 50,000-year-old horse bone. Or the researchers who ate a piece of meat from a 36,000-year-old bison corpse, for no other reason than to see if they could. We guess what we’re trying to say is one of two things. One: Old food isn’t going to kill you if you’re careful. Two: Studying hard might let you eat a dinosaur steak.

The claim has since been refuted, I think, but to my knowledge the refutation never said it wasn't possible.

But do you think this is a good idea? I'm wondering how the quality of the meat would change after being frozen for tens of thousands of years.

BTW, Wrangel Island apparently supported a mammoth population until about 2000 B.C. :jaw-dropp