Perhaps the biggest revolution of photography is the invention of digital cameras. Now, everyone can take photos either with their mobile phones or a digital camera. In fact, every household has an appliance which allows them to take photos.
Many people saw my cameras and asked me what is the difference between one camera and another, or why buy a more expensive camera. I find it difficult to answer except by giving them an analogy that they are all familiar with.
Imagine you have to travel from point A to B which is a few hundred miles by a car. If the condition is ideal, you can use any car and you will arrive in quite a good condition and with a skillful driver the passenger will arrive feeling reasonably good, ie, not giddy/tired. Therefore, in ideal condition, any camera will take a reasonable photo. With some skill, the photos actually turn out very good. However, life is never ideal!
The problem arrives when there are patches of road which are sandy, or smeared with oil, or not level, or badly designed, or encountering heavy rain or wind. Using a cheap car with no fancy electronic, etc, the journey may be interrupted, delayed, accident, etc. Translate this to challenges in photography like poor lighting, strong back light, poor weather, fast moving object/subject, etc, you now need a better camera and also skill to operate in order to get better photos.
I compared high end camera with a high end car. I leave it to your imagination what you are going to do with them. Why someone buy high end car as oppose to a cheap ones? You tell me.