Lots of Ryzen motherboards support ECC.

http://www.asrock.com/mb/AMD/X370%20Killer%20SLIac/#Specific...

I think I may go AMD (again) for this very reason.

(Generally, I don't think ECC actually does matter that much for us casual/home users, but I like to reward the people who actually do make it easy to "do the right thing". Same deal as only purchasing AMD graphics cards since 2005-ish(?).)

If you're not worried about certain chip features and power draw, last gen server equipment is very cheap.