Not sure if these questions haven't been posed in other threads, I know the Spotify v CD's one has.
I've lost count of my CD's, the drawers I made was designed to hold about 1000 and they are over 80% full by the look of them. Not all of them are metal, and most of them are just dust collectors these days because I generally don't listen to music in the lounge where the CD player and stereo is. I don't buy vinyl any more because of the outrageous prices here in Oz and because I don't visit too many second hand stores, but everything I have on CD, cassette, and vinyl are all ripped and digital music is generally just easier for me to listen too, because everything these days from the computer to the car, to the phone, even the tractor has either USB or SD and I can put a heap of albums on a single card and listen to it for weeks.