Related: Why have hard drive sizes stagnated? It feels like 8TB has been the golden standard going on 8 years now.
I'm very close to doing the following: Putting 6 drives in a portable RAID device, and ripping my movies to 720p x265 for storage. I can store a near limitless amount of movies and TV shows this way, and honestly I don't notice 720p. At least not enough to trade a 1GB movie for a 45GB 4k Remux. And I own a latest brand new 65 inch LG OLED and Sony OLED.
Added benefit is that its trivial to stream this anywhere at home or remotely. The files are so small that even scanning around the movie is instant.
The only thing holding me back is 8TB hard drives. So I wait patiently and continue to pay for a plexserver some guy manages for me.