It would be wonderful. I hate how pre-kids I could choose to work 'off peak' and avoid horrendous sydney traffic by sleeping in, going in late, working late. But thanks to inflexible childcare I don't get a choice about that, which is really just more wasted time in traffic for everyone, with no benefit.
I wouldn't leave them there for LONGER hours... but I'd sure like to leave them there for DIFFERENT hours!
Possibly less time overall due to not having to spend so much time in peak hour traffic as you mentioned, and a less stressed Mum, win-win for the kids
I cant quote the post further down about extended hours childcare having been available in Sydney for years, but thought it worth mentioning there is also one in Adelaide in the cbd