[That's the bit I can't figure out yet. If there's no difference between the software unfolding on a generic DAC profile and the dedicated hardware unfold on an 818v3, then there's no point in doing your upgrade (aside from the convenience of being able to stream MQA remotely, a la Roon, versus having to have a laptop attached to your 818). If, however, hardware unfolding and a proper DAC profile makes a big difference to SQ even into your current system, then the upgrade is probably money well spent. It's hard to tell at the moment!
But many people argue that the ADC DAC matching made possible with dedicated MQA systems is one of the most crucial elements to achieving the best sound quality.