Author is saying that some decisions aren't as obvious as "my code should be reliable under high load". Some decisions are tradeoffs that require you to have domain/technical expertise to answer.
replyAnd some do require design thinking. Like sndio or alsa, drm, caddy, … With no domain expertise and technical knowledge, a lot of software are out of scope.
reply> It definitely improves the results if you do think but I don't think "you still have to think" is a safe space that's going to save us from unemployment.
replyWho said anything about saving people from unemployment?
> I noticed unreliability during high load
This is pretty ambiguous. You still need to provide more context, such as which failure modes you are trying to benchmark.