> but if we end up with an abundance of just 1/2 bedroom rental apartments

That's still a massive win. To replace 10 single family homes supporting 2-3 people each with a 9 story building supporting many multiples of that is a win for society.

If the people chasing 3 and 4 bedroom apartments accepted smaller rooms, they could still be economical vs studio/1/2 BR apartments and condos.