Man I'm glad that I didn't miss out! I was just chatting with someone an hour ago about having missed the RMAC registration and said that I would be furious if I missed out on registering for EBR. Then, I went to the site and saw that the 2021 registration was OPEN!
I was at a vet appointment and realized they're still using that ancient web form that doesn't work with mobile Safari and Firefox for iOS! Raced home and was able to register from a computer browser.