Lmao!! An interesting comparison...It's got nothing to do with numbers LMAO. you're literally using 20 year old audio technology and wondering why you're "back to square one" lol
If there's no benefit to higher bit rates, why do you have a separate blu-ray player? Why not just use your PC as a HTPC and download blu-ray rips and listen to the lossy Dolby Digital soundtracks instead of the lossless TrueHD, DTS-HD, Atmos etc?
A) because downloaded rips (1080p or 4k or not) ACTUALLY look (and often sound) noticeably (often considerably/massively) worse, even 2 different 4k versions might be much darker than one another. Likely because they've compressed a 160gb file into 20g odd using dodgy software.
B) is there often missing subtitles of features
C) it's stealing and well.
D) its nice to own it.
E) no download time.
HOWEVER I'm basically on minimum wage after covid took my job, and as noted in sub thread I don't know why i bother as Netflix and Disney+ look and sound so close and better (somehow) in some movies, £25 odd for a film is a LOT of cash to me, maybe not you and many audiophiles with £3000 arcams etc.