The consensus appears to be that the value of LTG is the fallback position of status for “when I am older and travel less”. I get that feeling, and am not disagreeing with the warm fuzzy feeling. What I want to discus sis the real COST of gaining that, and whether it is worth it. If all your travel to qualify was paid for by someone else, then the cost issue is not applicable and it is just a freebie that your life gained you.
To further my ponderings on LTG value and the reality (or not) of its actual real benefit, I just played around with some mathematics. (please feel free to throw rocks at my figures)
But first a few things:
I know that theoretically there are ways to achieve SC very fast at lower cost, such as status runs in the US and so forth. But these (for the vast majority of people) are not real. Sure, many on this forum have managed shenanigans, but if we go into that it probably would actually further my position that “LTG is a carrot that most end up paying a lot of unnecessary cash to chase, and will probably never eat”
For my example I start by whittling down the myriad scenarios to get some sort of baseline situation that is probably very real for “most”. I use the following:
1.- Average time to amass LTG = 20 years (ie 700 SC per year) Here I am discounting all the P1’s and so forth, using the argument that if you were a P1 you (a) probably had work of a decent income level, and (b) are really sick of flying

, so in combination this means that you would probably travel in premium cabins in retirement anyway, so Gold does nothing for you.
2.- Average cost per year of travel spend is $7,500. This would be $10,000 if flying was domestic Y RedE deals, or $5,000 if you used cheap J trans-tasman deals – so I split the difference. (BTW this gives an average of about $10 per SC – YES I KNOW THAT THERE ARE CHEAPER TRICKS)
3.- I “reckon” that if spend was done on economics alone (not keeping loyalty to QF nor doing status runs or other modifications to pursue LTG), it would be very easy to save $1000 per year (ie save about 15%)
4.- I use a life scenario of 20 years working/gaining LTG status, then a “retirement phase" of another 20 years where the person does 10 trips a year whilst enjoying their LTG status.
Anyway, if this notional person put that $1000 saved per year into savings, at an interest rate of 4% (not unreasonable over a twenty year time frame), they would have amassed $30,000 by the time they gained LTG.
Travelling those ten flights a year for those next 20 years, this means their LTG benefits will have cost them $150 per flight!!