I thought so too but that's because I'm logged in with setting to use old Reddit. www.reddit.com works in incognito.
This is the situation I'm seeing. Didn't occur me that old was down because I just have that as my default setting for www.reddit.com.
No issues with new reddit here. Old reddit just serves "You broke Reddit".
Check again, it's truly broken now.
Testing now, I'm able to open www.reddit.com links, but not their corresponding old.reddit.com links; the latter lead to a page which says "YOU BROKE REDDIT".