Your ISP has working battery backups. Don't expect it to stay on for longer, widespread outages though. When the power is out for a week, satellite is usually the only thing that will still work.
ISPs that still provide DSL, really don't want to put any effort into maintaining their equipment these days. They probably stopped replacing the batteries a long time ago.
You could use acpid to run a script when switching between AC and battery power. Here is a forum post where someone used it to start and stop a compositor.
You can get conductive paint for RFI shielding. It's very conductive, so make sure that the case can't come in contact with any circuit boards or it will short out. Make sure the paint is compatible with the type of plastic you print the case out of too.
They also make ESD safe filament, but it's $150+ a roll.
Are those mechanical hard drives? If so, I would want a fan moving air across them. Also keep in mind that most filament is not ESD safe.
Don't install their spyware apps in the first place.
SSHFS is slower than NFS due to the encryption and FUSE. It's not a huge difference with a modern CPU and a 1 gbps connection, but it can be significant with an older CPU or a faster network.
You can use NFS over the internet, but it will be a lot more work to secure it. It was intended for use over a LAN and performance may not be great over the internet, especially with high latency or packet loss.
Some software for programming an old RadioShack scanner that was last updated in 2003. Since the scanner connects over a serial port, it works perfectly.
Not everyone uses English. Many languages can't be written with only ASCII characters.
NFS is the best option if you only need to access the shared drives over your LAN. If you want to mount them over the internet, there's SSHFS.
That would be one of the top three reasons for doing it.
Fresh water doesn't mean drinkable water, it just means not salt water. The desalination plant produces drinkable water.