On the limits and perils of being data driven: https://twitchard.github.io/posts/2022-08-26-metrics-schmetrics.html
(Worthwhile improvements are often not amenable to A/B testing, and metrics can harm intrinsic motivation.)
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I'm debating whether `from foo import *` is a bad feature for my toy programming language.
Forcing `import foo as f` and later `f::bar()` is so much more amenable to local static analysis. You also don't get issues with name clashes.
It's certainly convenient though.
C# has an interesting concept of second-class macros called Source Generators: https://devblogs.microsoft.com/dotnet/introducing-c-source-generators/
You can generate additional code at build time, but you can't transform existing expressions (unlike normal macros), so it's more amenable to tooling.
An interesting discussion of different ways of funding volunteer-run FOSS projects, and which boring tasks more amenable to charging: https://blog.tidelift.com/open-source-has-a-working-for-free-problem