Personal point of view
I guess that a combination of circumstances and opportunities has made me a Google Apps Script addict, but maybe in different circumstances, I could have learned a different language. Life is not always a matter of choice, but I must say that I'm really happy about this coincidence! It makes me feel like I am part of a really modern movement, something unique to our present environment.
Google Apps Script could not have existed in the 80s, nor even in the early 2000s. Computer technology was not powerful enough.
That feeling of modernity is actually quite pleasant, at least as far as computer science is concerned. Unfortunately, not everything in our modern world is so alluring, but that's another story.
My only hope when writing the final words in this small book is that I have given a few people the desire to go further with Google Apps Script and help them get enough self-confidence to start their own project.