Honestly, I get it. If you have a relatively small stash of media, say a couple TB worth, you can pretty easily say "well I watched this movie, so I'll delete it and make room for the next. When you get into the 10's of TB range, the mindset has switched from it being a dynamic, temporary library to a repository. And it becomes easier just to plug in another 10-20TB drive occasionally, rather than trying to curate thousands of movies and shows.
I can see both sides though. There's certainly something to be said for being deliberate about the media you consume--and therefore only needing enough storage for your immediate viewing plans. I'm not quite into the 100TB range with my library, but I definitely have moments where I feel like having so many options makes any given option seem less appealing.
I've almost entirely ditched streaming because of my library. I like to think I've learned how to encode media at a quality better than most services stream. Only service I still subscribe to is crunchyroll. I also run a plex server and share access with my family, so it's got its uses. Its not just me watching all of it. But I'm probably adding around 5 movies/tv shows to my server almost every day. The threat of ever dwindling disk space looms large.
Same here. I initially had high hopes that my family would take advantage, but apparently my parents would rather bug my siblings monthly for their Hulu/Netflix/Max/Disney+/Prime logins than install Plex or Jellyfin lol.