Occasional page load failure while logged in? Pretty common. Complete or nearly complete failure for logged-in users? Happens sometimes. Completely down such that not even a logged-out user can read it? I'm not sure I've ever seen that.
I wonder if Reddit is ever going to fix their "you broke reddit" thing. I probably see that page a couple dozen times a year, and it's been going on since, what, 2014? Earlier maybe? It's like the Twitter fail whale. Except Twitter fixed their site.