how come people buy dvd and blu ray?

[GooseGaws]

Moongoddess256 said:

My reason: because your movie library is your friends movie library and vice versa.

If I buy a movie I can watch it and recommend it to my friends and then they can borrow it and watch it too. They can do the same for me. So amongst a group of people if you think about it the price you pay for your dvd is for everyone you know to watch it too.

This is a big factor, indeed.  I enjoy having a library of films that I value, so that when someone says "I've never seen x movie," I can say "well, we can fix that right now!"  The experience of sharing something that you consider to be great with others is always an interesting one.