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in reply to @vogon's post:

The title limit is 140 because older versions of Cohost would crosspost just the title (without the post body) to Twitter even though the limit on Twitter had already been lifted to 280 (@staff hadn't gotten the memo)

However, people would frequently chost title-free chosts and Twitter doesn't permit blank tweets, so every time someone chosted without a title the cross-posting message queue would crash and a Cohost staff member would have to restart the message queue. Since the staff was OOO on weekends this led to the cross-posting feature frequently being broken on Saturday and Sunday.