In the practice of computer science, change is inevitable. New architectures are created; processes are updated; levels of expertise increase. Innovation is everything. Nothing remains the same for long.
We either adapt to change, or we get left behind.

Change. 
We don't like it, we fear it, but we can't stop it from coming. We either adapt to change or we get left behind. It hurts to grow. Anybody who tells you it doesn't is lying.

But here's the truth.  Sometimes, the more things change, the more they stay the same, and sometimes change is good. Sometimes change is everything.