I didn't think it was controversial that SSDs are terrible at long term storage?

Right, but the news is that someone finally actually tested the unplugged-is-worse theory in a long term real world test. So much of the existing data about SSD endurance has been exclusively SSDs in datacenters plugged in 24/7, so it's nice to see some data showing what the difference actually looks like.

I wouldn't say it's controversial but I suspect most people don't know about it. There's been a lot of discussion about SSD write endurance but almost none about retention.