Why? Because I want the highest-quality possible copy. Same reason I download lossless versions of albums. It’s less about being able to perceive the quality increase, and moreso about archival. Then my Plex server can transcode to appropriate streaming bitrates on the fly without having to re-encode an already heavily compressed video stream.
And building and properly maintaining some not-so-small array of massive HDDs for those capacities... I just don't see the point when I can get all I need (and ie in sound much much more), without caring more than buying a single hdd and be done for next 5 years.
Its not the bandwidth, 1gbps is easy to get here, stuff I saw in those sizes was well seeded too, but just overall all added extra work.
You don’t need a massive HDD array, I have my whole collection of 10+ years of Blu-ray remuxes on a single Seagate Exos drive in my NAS.
X265 1080p movies for both rippers are roughly 1.5-2GB per average movie, which is on average 1.5-2h long. You won't find better quality in this size range, in same way 7-10GB seems a sweet spot for 4k (especially with AV1 instead of HEVC). Not sure who & why downloads those 80GB full bluray releases.