When Nvidia discusses choosing Ada for security critical software, they mention the cost of fuzzing (slide 17). It's an interesting argument: if the language gives you more assurances, you don't need so much compute to fuzz test!
https://www.slideshare.net/AdaCore/securing-the-future-of-safety-and-security-of-embedded-software
miniblog.
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Semver has a really odd relationship with software maturity. I'd take a v0.21 project over a v1.0 project.
Do any tech streamers try new software live? It'd be a really fun way of doing UX testing.
For hobby projects, I really like software where I can do small features or tweaks. Sometimes I don't have time for anything more substantial.
Website projects are great for this. Are there other areas?