Given they were required to add an interface to back up your recordings back in the 90s (I think it was the 90s), I'd kind of agree. The DVR itself makes a crappy long term storage, but the spirit is akin to a VCR, totally intended for saving video recordings.
Edit: after a lot of reading, I cannot seem to find a source for what I typed, I must be misremembering things, maybe FireWire was added by the kindness of manufacturers back then.