I really don’t think that fast commands are still a thing at JQ. As previously mentioned, the fleet size is approaching its natural limit, the existing captain cohort is younger than airline average. QF had a lost decade without hiring or promotions. The demographics there are much in favour of the new joiner because the airline appears to be expanding and the retirements will soon accelerate. I imagine a new hire at QF could get a SH command* in ten years, or a right seat on a senior LH type which may be as lucrative anyway.
*Assumes industrial status quo. Assumes QF group revenue recovery sometime soon. Also assumes wet markets don’t cough up another pathogen anytime soon. All big, unsafe assumptions.