It is pretty interesting that most people don't take compatibility seriously. There is the famous saying, "If it ain't broken don't fix it" and another "Move f

It is pretty interesting that most people don't take compatibility seriously. There is the famous saying, "If it ain't broken don't fix it" and another "Move forward", compatibility I feel is the link between the two, moving forward while not breaking anything. So yes it is very important. Some cool examples: [o]You can still design a fully functional website using the basic html markup and it will still render finely on a Netscape 4. [o]You can still make Doom play on the latest Windows. [o]You can still get one of the oldest linux programs such as DC Calc or Roff to work with the lastest Ubuntu.