Errr... What do you mean by "easily affordable"? A quick look on Amazon says that I'd be paying something like €18.80/TB, so buying 400TB would be €7,520 - far out of the range of the majority of hobbyists. Plus a 100GBE NIC would be another €800 or so, plus you'll need all the other ancillary things like a case and a processor and RAM and cabling and whatever the monthly cost to host it somewhere, unless your ISP gives you a 100Gbps connection (which I'm sure will be extortionately expensive if they do). End result is the hardware costs alone approaching €10,000 - significantly more if you want any sort of redundancy or backups (or are you planning to run the whole thing in RAID0 YOLO mode?), plus probably low-hundreds per month, not including the time investment needed to maintain it.
I mean, I spent about half that just on the computers in my apartment and I only have a 56Gbe LAN
I shouldn't say "easily affordable" like anyone can afford it, but rather something that you can do with off the shelf retail components (within the budget of a hobbyist software engineer, anyway)
it's cheap compared to hobbies like driving a sports car, at least!
