Why would you want to use such a thing?
From what I remember those reels with tape cost more than CD's, which are also already obsolete.
Why do friends go to spend hours trying to outsmart a fish? You could buy a fish at the market cheaper.
Why do people do anything? I favour George Mallory's reason. Mallory is famously quoted as having replied to the question, "Why did you want to climb Mount Everest?" with the retort "Because it's there".
But I'd be OK with nostalgia, experience, pursuit of knowledge, to challenge oneself, bragging rights, joy of sharing and so on.