The interesting part is in how actually valuable improvements are rare, while useless "improvements" are common.
I've got all music in 44.1kHz or 48kHz FLAC (only on the server, so I can transcode it to ogg opus for mobile playback reducing the space usage without lossy to lossy artifacts). Similar effects apply to many other such cases.
Audiophiles buy 10'000$ golden HDMI cables... which don't even support HDMI 2.0a. They buy gold-plated toslink cables (!)