No one needs MQA except those making money off of MQA.
Indeed. The simple fact is that MQA will not allow a controlled listening test to demonstrate its efficacy. Enough information and investigation by 3rd parties has demonstrated it is of dubious merit. So clearly MQA know it will not stand up to proper scrutiny.
My own subjective analysis of it FWIW concluded the differences heard were caused by different mastering and playback conditions.
The only argument it has going for it is that it can reduce streaming bandwidth. This argument is only relevant for the streaming companies, its not important to the end user. The bandwidth compared to video is trivial and will continue to become more so as bandwidth increases and continues to fall in cost.
It's a solution without a problem but it certainly does generate a revenue stream for Bob et Al.