You know, I refuse to buy anything that does not support ECC for my home desktops (and don't even pay much for it). Only my laptop got a pass from this because there was literally no option available with it.
Good to know cloud providers are not as careful... But honestly, shouldn't be a surprise.
1. RAM that works at this price.
2. RAM that allows more crashes or corruption of your files for slightly-lower price.
The Right Thing suddenly looks more obvious except to cheap skates. Now I just need one with ChipKill built-in. That's the next level of ECC. I haven't heard whether Intel or AMD got something similar.
Intel's encrypted RAM is authenticated quite nicely, but it's not (yet?) designed for general purpose use -- it's for SGX only right now. Using it for everything would (if I understand correctly) add considerable space overhead and possibly considerable latency.
Google, for example, are famous for making big data centres out of cheap commodity boxes, and I double Amazon are any different. I certainly know the rackspace blades I've played with didn't make my grade of either! :)
One of the main use-cases for these technologies is trusted computing in a cloud environment - the customer can assert that the hardware is securing the program state from the eyes of the computer owner!.
However, the cloud is actually made from cheap commodity boxes without server-grade anything! ;)
Encrypting RAM pages would prevent the hypervisor from deduping pages between virtual machines, and this would be very negative for cloud providers who want to up the occupancy on each box as much as possible...
In a few years, or perhaps longer, perhaps proper DDR4 and other immune memory will be mainstream in clouds. But until then, it seems we'll have a cloud fitted out with increasingly aging cheap machines with no rowhammer immunity.