You know the saying Do not fix when it is not broken? I like this saying very much. I love keeping things simple. The simpler things are, the less prone to error they are, right? Not to mention, maintenance is easy too.
But in this era, upgrade has become a regular thing.
You have a mobile phone that allows you to contact people on the go, which is probably the reason why they were created. Then new units with new features started to come out almost every month, leaving your newly-bought-phone behind. And people, who knows no contentment, seeks that new model. This is true with any other gadget out there.
Upgrade has also become a regular thing for systems. And in this area, things become a little complicated. I am sure, you know what I am talking about.