Meanwhile, Backblaze still happily backups up the 100TB+ I have on various hard drives with my Mac Pro.

Does it? How do you know?

If they start excluding random content (eg: .git) without effective notice, maybe they AREN'T backing up everything you think they are.

You don’t do quarterly restore tests?

	▲	Semaphor 5 hours ago \| parent [-]
		How do you do that? My naive idea: Download 100 TB every 3 month to a 2nd device, create a list of files restored, validate checksums with the original machine, make a list of files differing and missing, check which ones are supposed to be missing? That sounds like a full time job.