Why? Because software is complex enough as it is, and you need to question whether you need to add additional moving parts for little benefit. Everything that y

Why? Because software is complex enough as it is, and you need to question whether you need to add additional moving parts for little benefit. Everything that you can add, can fail in some reason. Especially something like HTML minification, which cannot be transparently minified (for instance, when you need to use white-space: pre)