Large black holes currently grow
Hawking radiation is weaker for larger black holes. For stellar-mass black holes, the energy absorbed from the cosmic microwave background currently exceeds the energy they emit, so they grow rather than evaporate.
Why stellar black holes are currently growing instead of evaporating
Hawking radiation is weaker for larger black holes. For stellar-mass black holes, the energy absorbed from the cosmic microwave background currently exceeds the energy they emit, so they grow rather than evaporate.