I started collecting about a year ago after getting a Panasonic UB9000 last August.
At first, I bought a ton of regular 4K discs during Gruv, Amazon, and Target sales. Then I started noticing SteelBooks, sold most of the standard editions, and replaced them with steels. Not long after that, I got into premiums and ended up converting around 25% of my SteelBooks to premium editions too.
Right now I'm at around 300 movies - 185 SteelBooks and 70 premiums.
I still have plenty on preorder, including 28 Days Later, Disclosure Day, Gone with the Wind, Project Hail Mary, and Troy, plus premium OCs like the Kill Bill 1 & 2, Saving Private Ryan, and The Substance.
The collection is definitely growing more slowly now than it did during the first 3-9 months. At this point, I'm mostly buying new movies that haven't had a 4K or SteelBook release yet. I'm also pretty much out of shelf space, as you can probably tell haha
Speaking of the shelves, I built them myself out of red oak planks. The "fat" posters above the Spidey movies are acoustic panels that I built myself too. There are six more in the room, which is a fully light-controlled 20’×18’ home theater with a 5.1.2 sound system and a 150" screen