I have been collecting music CDs for more than 20 years - it's my "thing." My collection just recently hit the one-thousand mark.
I love movies as well, but I never got into the habit of buying DVDs big time the way I did with music. I do occasionally pick DVDs up if I find them cheap at yard sales or thrift shops but I don't consider myself a movie "collector." Unlike music CDs, which I can listen to over and over, I'm not in the habit of watching the same movies again and again... so unless it's an old favorite that I know has replay value over time, most movies are a one-shot deal for me.
So I'll keep collecting CDs, but thanks to my accounts on Netflix, Amazon Prime streaming and a play list of full-length movies on YouTube, I already have more movies lined up than I'll ever be able to watch in my lifetime and they don't take up any shelf space!.