> so small ones would not live very long Actually, this is completely unknown. While Hawking radiation is a well-established effect in the semiclassical limit

> so small ones would not live very long Actually, this is completely unknown. While Hawking radiation is a well-established effect in the semiclassical limit (read: when gravity is weak), we don't really know what happens when the Schwarzschild radius reaches scales where tidal effects become noticeable already near the event horizon and, eventually, quantum gravitational effects (supposedly) take over. In fact, this whole question lies at the heart of the black hole information paradox. Do black holes evaporate completely? Or will evaporation stop at some point, leaving behind a black hole remnant?