I would be easier to accept if it was just an extension of IPv4. Make the addresses longer but keep the types A,B,C,D. Keep the network address x.x.x.x/y. That

I would be easier to accept if it was just an extension of IPv4. Make the addresses longer but keep the types A,B,C,D. Keep the network address x.x.x.x/y. That way everybody will be familiar with it and change will be done smoothly.