When folks wonder why Julia hasn't displaced Python or R, despite being better on a number of fronts, I'm always reminded of this quote (courtesy of wikipedia)

When folks wonder why Julia hasn't displaced Python or R, despite being better on a number of fronts, I'm always reminded of this quote (courtesy of wikipedia) by Eric Raymond around why plan9 never went on to displace Unix: > [I]t looks like Plan 9 failed simply because it fell short of being a compelling enough improvement on Unix to displace its ancestor. Compared to Plan 9, Unix creaks and clanks and has obvious rust spots, but it gets the job done well enough to hold its position. There is a lesson here for ambitious system architects: the most dangerous enemy of a better solution is an existing codebase that is just good enough. Python is good enough, and Julia isn't "Better enough".