[flagged]
I can't count the number of times I've wanted to try out some library and whipped up a quick prototype app in an hour or two to play around with it. I don't give a damn if that app is memory safe, handles signals safely, satisfies arcane aliasing rules or deals with any of the other million footguns in C/C++. I'm happy if it compiles and does what I want it to. I deal with that stuff when I inevitably rewrite it from scratch the next day and have an actual design in mind.
FWIW, I'm comfortable enough with Rust that I would personally choose it over C or C++ for most stuff like this these days since the standard library makes a lot of boilerplate prototyping stuff (e.g. setting up a project, pulling in dependencies, handling files and I/O) much more pleasant. But suggesting that anyone who writes unsafe C/C++ in any context doesn't know what they're doing is ridiculous.
Have you ever found that decision harder to make because of shortcuts etc taken during prototype?
I used to work on a product that handled video, and I would regularly spin up prototypes where I’d stitch together gstreamer pipelines with different plugins to try things out. For reasons that aren’t important, it was easier to use an app linked against the gstreamer libraries than to use its CLI.
There were all sorts of ways I’d evaluate some plugin I was trying out. Maybe I’d look at some test pattern for artifacts. Maybe I’d measure latency. Maybe I’d profile its resource usage. But I can confidently say that in all of those cases, the memory safety of the 100 lines of C++ code that told gstreamer how to plug things together had absolutely no impact on what I was evaluating.
Sometimes the code you’re writing is basically unrelated to what you’re interested in from a prototype.
I feel like I am missing some very obvious point of yours because that statement in isolation I cannot agree with (I've read the rest of your comment and still can't find the extra context). Can you clarify?
Working software: Does the software satisfy the use case?
Correct or safe: does the software enter into any invalid states? Are edge cases handled?
Does that help?