I think the main barrier to WFH is the loud shouting of those who think people can't be trusted to do so. And I would add that, in my opinion, the ones who complain the loudest are the very ones who can't be trusted.
My eldest who works in Melbourne, has been working from home since March. He's now considering moving to somewhere warmer, perhaps Brisbane, and commuting by plane when office visits for meetings are required. He's actually proposed this to his employer so it's not pie in the sky.