Continuous Deployment is the 'put your money where your mouth is' of software testing.
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Do any tech streamers try new software live? It'd be a really fun way of doing UX testing.
When writing long-lived programs (daemons etc) in Rust, I find myself asking *where* I should put data.
In a GC'd language it's just "I have a string" but Rust forces me to find somewhere to put it.
You do get a performance benefit for this work though.
Individuals and interactions over processes and tools => Competence trumps process
Working software over comprehensive documentation => Minimize time from program launch to deployment of simplest useful functionality
I really like the DoD's phrasings of classic agile maxims: https://media.defense.gov/2018/Oct/09/2002049591/-1/-1/0/DIB_DETECTING_AGILE_BS_2018.10.05.PDF