I think, you also thinking same: for recent time, Discord's server is working glitchy, slow, offten going down, and for now it has turned into read-only mode
EDIT: For now, chat is available for write, again
Their official post:
Discuss here about everything you want till there are will repair the server
EDIT2: Okay, seems there are finally repaired everything, therefore I can freely mark this post as "useless"
EDIT3: Their server have died. Again.