Answer by Evan Priestley:
Although Twitter is written in Ruby, its was not written by those pure of heart. Their souls had been tainted by prior association with other dark languages, like PHP. Had they summoned stronger resolve and avoided these temptations they might have walked the true path, but they allowed themselves to be lured from it by the siren call of foul demons. Ruby guarantees that every program you write in it will be perfect only so long as you maintain complete and total ignorance about other languages. To remain righteous, you must blindly walk the path of the zealous.