Reddit status page: https://www.redditstatus.com/

Examples:

https://old.reddit.com/r/politics/comments/144pdan/megathrea...

https://old.reddit.com/r/news/comments/144oxva/donald_trump_...

https://old.reddit.com/r/wallstreetbets/comments/144pg5s/cra...

Edit: It appears fixed now, but it looks like only new comments are showing. The comments made during the blackout period still aren't showing.

This is probably not a bad thing