For me, 1.5m should be our largest cities and most should be 100,000 or less.
Melbourne is too big now.
20 years ago was still ok to drive on roads without feeling like they are clogged.
If you went to Sydney then and drove you noticed how ****ed it was there, some of it because of the problem of getting over bridges for the harbour.
Now we are almost as bad as Sydney.
Brisbane is pretty bad too but more so because of s**t design and signage.
Adelaide and Perth must feel like heaven to drive in.