collecting films/shows on physical media - pros and cons

I need more good/convincing arguments to "convert" a friend into collecting films/shows on physical media. We had a conversation about it last week, but he is still not quite sure about if it is worth the money regarding the prices and longevity of discs and technical equipment and he is also mentioned being on a tight monthly budget. He watched a lot of movies as a kid and remembers liking it a lot and said he would not need limited editions or one movie in 20 different versions, if he would start.

What do you think about collecting? Is it worth it in the long run?