But the end user certainly doesn't care how long the program took to compile,which is something the author lumped together with runtime. But end users do care

But the end user certainly doesn't care how long the program took to compile,which is something the author lumped together with runtime. But end users do care about programs not crashing and losing whatever they were working on, they care about features, and they care about how long it takes for them to get the features they want, all of which are impacted in some way by the language and tools used by the programmer.