With the difference of my papers being due for regular courses (and not for any conference), this short vignette pretty much summarizes my last few weeks.
I have also had up to three different deadline extensions myself, and every time my feelings were quite similar to his 'aargh': on the one hand, you are happy because you get more time to improve what you've done before submitting; on the other, certain projects risk turning into a remake of the Neverending Story. Work, work, work and more work.
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That even deserves its own name... Student syndrome