As someone that used to own hundreds of dvds then upgraded to bluray and now have a smaller collection of 4k uhd's for only movies that i really want to experience to the best that they can be viewed. On the flip side i have inherited my dad's laserdisc collection which started in the early 90's but generally looks horrible on a modern tv. They don't take up much space but i should sell them.
I also have a server with 50tb of space but forever having drives fail it's a costly situation so now i generally use stremio or kodi and a realdebrid subscription and stream 4k or 1080 and don't collect anything anymore.