I have zero streaming services, but 1k videos and 15k music tracks. All of them being shared across my local area network. My mum uses it, I use it, and my guests use it - you can literally copy junk from my HDD into your phone if you're visiting me, as the SMB login is anonymous.
Fuck streaming services. I'd be glad to pay for some if I could trust them, but I don't. Suddenly your plan is more expensive because "reasons", or whatever you bought is unavailable because "ackshyually you don't own it lol", so goes on. If buying is not owning then what I'm doing is not theft anyway.
And, sure, my hard disk could go the way of the dodo. There's always this risk. But compared with the certainty of streaming services becoming arseholes? I'm willing to take the risk, thank you very much.
(I'm also considering to buy a blu-ray external reader, to back all this shit up. So far it isn't a concern because I can redownload it; in the future, however, it can be.)