I just checked and it's still there. There is a chat bubble icon in the upper-right, between the mail icon and shield icon. It somewhat works on old.reddit, b

I just checked and it's still there. There is a chat bubble icon in the upper-right, between the mail icon and shield icon. It somewhat works on old.reddit, but at least it's not completely broken like the "report" feature for comments or posts that break the rules. (To report something, I have to switch to reddit's mobile interface.)