Given the preponderance of Stack Overflow, I expect this site to have a lot of questions about software. However, software is just one of many things one may want to reverse engineer. The inclusion of other fields in the scope is a critical argument for the very existence of the site — otherwise, the reverse-engineering tag on Stack Overflow would be sufficient.
So far all 7 questions are about software, but that's not a statistically significant sample.
Should all questions involving software be tagged software, on the basis that they are the questions generally interesting to programmers and other people whose fields of expertise is software? Or should there be only finer-grained tags?