They're a tad bigger than that (100 GB per disc), and I've lost enough hard disks over the years to not want to have to deal with backing up files that big. Not when I can have a small collection of shelf stable discs that won't suffer mechanical failure short of deliberate damage.

Anyway, you can disagree all you like. If it's not inconvenient for you, excellent, but for me it is. Hard disks sit in the back of my mind as ticking time bombs that I need to keep an eye on if I want to trust them. Ugh, I've done enough of that in my life. So many dodgy disks!

Oh and that also assumes a load of infrastructure in my home that I don't have. I know how to set it up, but I don't want to. Been there, done that. I'd rather check the second hand UHD shelf at CEX and pick up the occasional disc when the price isn't silly.

Of course, eventually my UHDs will decay, but the timescale is decades rather than years.