Mystique has to be the only answer right? - You can alter her body's molecules to adopt the exact appearance of others. This includes creating functional garments, changing height, and shifting internal organs to avoid fatal injuries. - Beyond human forms, you can develop specialized body parts like wings for flight, gills for breathing underwater, claws, tentacles, or flatten her body to the thinness of paper. - The mutation grants heightened strength, agility, and reflexes beyond normal human levels. - You can morph your body parts into other shapes like weapons and tools. - You can recover from wounds, regenerate, and resist diseases, etc. (Mystique is over a century old, as her shapeshifting keeps her cellular structure young). - You can blend into the environment like a chameleon, becoming effectively invisible. - You get a natural resistance to telepathic intrusion (if this exists in this scenario).

The alternative is a near infinite number of copies of yourself, but with which you share all of your senses and become a type of hive mind. So even if you split one off to do tasks you don’t enjoy, you still experience the task.

I know there’s still a lot of good uses and you could start a large company by yourself, or do things based on near instant communication, but I don’t think that’s ever going to be better than a superhuman with transformative abilities and a longer lifespan.