Yes I saw that from Cranky.
I agree it is an incredible change. Dare I suggest a carrier like EK could wear that cost, but that's a whole other argument that isn't really relevant to the customer side.
As for EK's "backend" - two things.
1. EK uses SABRE and not Amadeus. Different platforms.
2. I would go so far to suggest EK pays for all the platform add ons and support to do all the fun stuff.
I mean EK was (is only??) the first legacy carrier to bundle Business Class fare offerings - and they do this with products provided by the GDS provider (ie: SABRE).
QF? Well.. we've seen their investment in IT is clearly not on par.
I do not know of the Amadeus offerings for airlines vs SABRE but it's obvious that either QF's solutions - ie the vouchers and all the rest are a real "kludge" (to use an IT term) on top of the GDS to make happen.. and by that it's far from perfect and has a lot of limitations - either via original design/decision or due to limitations in the way it's done.
Back 20 odd years ago when jetBlue first started they rejected the old=school res systems used by most and prefered a far more agile platform that they could fashion to use to create the levels of innovation they wanted... the result was a system called Navitaire... used by many LCC's (then jetBlue realised if they wanted to play in the wider airline world they did go with SABRE and then Travelport as partners, but that's a whole other thing).
In a similar vein Southwest AIrlines is one major major airline that does not participate in any other GDS and they do everything themselves.
but anyway I ramble about ancient history
My point is EK uses a different platform, and probably has the cash to use it properly, and yes they are innovating in customer friendly ways. Would QF follow? Who knows. I doubt it. It's certainly not the "legacy way"