What you say is completely true in my experience. Comically so. However when using a computer application and noticing unexpected and erroneous behaviour, what

What you say is completely true in my experience. Comically so. However when using a computer application and noticing unexpected and erroneous behaviour, what proportion is the time can the bug be traced back to hardware vs software? I’m going with about 1 to 1000. I think that’s conservative. Do you see it differently?