We live in a world where nobody is willing to wait for anything. We have become accustomed to websites and mobile apps working instantly. If I click on a search result from Google and it doesn’t load within a couple seconds, I will no doubt just click on a different result. We have all been trained to expect websites to load blazingly fast.
We also know that performance optimization can be very time consuming and potentially expensive. We also know that premature optimization is a bad thing.