I think they meant that Hetzner is offering specific machines they know to be faulty and should have EOLd to customers, not that they use deprecated CPUs.
It's not scary, it's part of the value proposition.
I used to work for a company that rented lots of hetzner boxes. Consumer grade hardware with frequent disk failures was just what we excepted for saving a buck.
AWS was working “fine” for about 10 years without live migration, and I’ve had several individual machines running without a reboot or outage for quite literally half a decade. Enough to hit bugs like this: https://support.hpe.com/hpesc/public/docDisplay?docId=a00092...
Anyway, depending on individual nodes to always be up for reliability is incredibly foolhardy. Things can happen, cloud isn't magic, I’ve had instances become unrecoverable. Though it is rare.
So, I still don’t understand the point, that was not exactly relevant to what I said.
I know serious businesses using Hetzner for their critical workloads. I wouldn’t unless money is tight, but it is possible. I use them for my non critical stuff, it costs so much less.