Bandwidth is perhaps not as relevant to today's individual user as previously - though don't underestimate the data appetite of hi-res audio on-the-go - but it is increasingly important to streaming companies delivering bucketloads of data; from both cost and sustainability angles. Also, bandwidth was just one of MQA's original three USPs, and its other two ('deblurring' of the recording and music file provenance) remain 100% relevant. People wishing death/retirement to an audio technology - one that is entirely optional to consumers as well as (comparatively more) environmentally friendly - mystifies me.
MQA albums files are sometimes actually larger than flac- especially MQA CD.
You can also take a hi-res file and convert it to 18/96 with dither - it will be no larger , and often smaller, than the equivalent MQA file, and if done properly - less lossy.
So no need for "file size saving via MQA".
deblurring-is fake. MQA, btw, never actually explained what it is; they just asserted that it existed and that their tech fixed it. No proof or actual verifiable demonstration was ever offered.
The digital filters MQA uses in "unfolding" actually ADD transient distortion to files. This has been objectively demonstrated. Too bad you aren't aware of the facts. (Of course, this added distortion may be euphonic to some and what they like about MQA).
provenance - also fake. When thousands of albums are released in a short period of time in MQA versions, what "authentication" do you think is going on? Answer: none. It's just mechanical batch conversion by an MQA algorithm. Not to mention: who do you think "authenticates" a 60 year old album from which the artist, producer and engineer have all died?
Answer: a low level clerk at the record company vault.
Plus: it's also been demonstrated that MQA files CAN be altered and still turn on the blue light. Again, you are woefully uninformed.
In addition, we have multiple instances of albums appearing in MQA where all of the principals involved said they didn't approve it and had nothing to do with the release. Neil Young was one, and he forced Tidal to take down MQA files because of that (as unlike most artists, he has legal control of his files),
So no "authentication" actually happens in almost all the cases- except for a small number of "white glove" MQA releases.
MQA had no purpose except as an attempt to use proprietary closed source tech to try and make money.
It serves no actual purpose that can't be accomplished without it, and at zero cost to the consumer.
It's simply a scam.