I never switched away. I still have my music that I collected since elementary school. Many songs would be impossible to find nowadays. There is no reason to go strictly one way. The good news is that you can start building your collection whenever you want.
Same. I spent several long evenings, back in the day, ripping all my CDs into MP3s and they've been copied from computer to computer ever since, and the collection has grown too of course since then.
I have weeks worth of music and I either "select all: random play", or choose an artist and listen to all their works.
For the past week I've been listening to Depeche Mode on repeat. Maybe next week I'll switch to Prince, Madonna, Hendrix, Prodigy, or Rammstein. It all depends on my mood, I guess.
Now that buying used DVDs costs no more than €1/film I've been buying a lot of physical media from charity shops. I've not bought more audio-CDs, but now and again it crosses my mind. If I stuck to used purchases again I think I'd be looking at €1/disk which is pretty reasonable.