A rare bird of my feather....mine is iFi DSD micro black fed by Sony NW_ZX300 into Sennheiser HD6xx. I agree with your interpretation, however, I do tend to collect FLAC 16bit as my baseline bc I feel the rips to a proper FLAC are made by encoders that are competent and passionate for quality sound.
I use iFi DSD Micro Black Label fed by a Fiio X3 into Audeze LCD-2 headphones... hardly mediocre, and the only time I can tell the difference between lossless and 320 mp3 is with very well recorded acoustic music. Even then, I have to really concentrate hard on every detail to be able to distinguish between the two. It makes no real difference with electronic music.