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Re:12 Factor CLI Apps by JdeBP on Tuesday October 09, 2018 @09:14AM (#18175643)
I strongly suspect that --help is on the contrary less universal, given that there exist entire toolsets lacking the --help convention but having manual pages. There was almost a quarter of a century's worth of Unix tools that developed before --help was invented.

* https://unix.stackexchange.com/a/416796/5132

* https://unix.stackexchange.com/questions/207136/

Re:12 Factor CLI Apps by dickeytk on Wednesday October 10, 2018 @02:15PM (#18187504)
How can you say it's less universal when it doesn't work on windows?