Bandwidth limitation is a great example of how specific circumstances should dictate backup protocol. Tape absolutely makes sense there even in a home environment. In your case, if it was really critical, I'd probably want to get two tapes at certain intervals so I could ship a copy off site and have the off-site copy online in a dedicated server at a data center so I could retrieve critical files if needed. Probably too extreme for a home setup unless it's a home business, but I've also had to restore from an overnight tape when a database went corrupt (multiple times) so if I was still involved in that sort of sys admin work I'd be a bit paranoid.
As for financial issues with "unlimited", Backblaze has a roughly 15 year track record and has been profitable for almost as long. They're not a typical startup looking to pump up a customer base by selling below costs and then dump to an exit acquisition or IPO. Storage is cheap, and they have managed to build a business that doesn't screw up the economics of low marginal costs by becoming overly bloated.
That said, they're still one of of two layers of redundancy I use for my home backups. I've seen cloud services lose files, so I'm banking on the fact that my own storage won't go down at the same time as two cloud services.
As for financial issues with "unlimited", Backblaze has a roughly 15 year track record and has been profitable for almost as long. They're not a typical startup looking to pump up a customer base by selling below costs and then dump to an exit acquisition or IPO. Storage is cheap, and they have managed to build a business that doesn't screw up the economics of low marginal costs by becoming overly bloated.
That said, they're still one of of two layers of redundancy I use for my home backups. I've seen cloud services lose files, so I'm banking on the fact that my own storage won't go down at the same time as two cloud services.