How about a conference called "In Retrospect" in which presenters revisit talks they've given years prior -- and describe how their thinking has evolved since?
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Replying to @bcantrill
*walks on stage* *puts up single slide* *stands in silence*pic.twitter.com/M9eewPC7md
1 reply 2 retweets 32 likes -
Replying to @cmeik @bcantrill
next year is 10 years since i made that comic... crazy. perhaps then would be the time to do a retro post; first thoughts are something like "computers are still machines, people are still human"
2 replies 0 retweets 12 likes
It's the best comic in the last 10 years
... Can't wait for the next decade's comic 
2:18 PM - 29 Jun 2018
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