It's not just that.. Coding in AS3 will require a little more work up front, but the Whole OOP system is pretty cool once you get your head around it and the Event model is so very flexible especially when creating your own events.

AS3 is what is called a strict compiler meaning alot of the loose things I'm very used to and really like in AS1 and Basic where I started just don't fly, You must declare the variables and datatypes, You can just say take the string from a textfield and assume that the program will convert it to say an integer just because you used it in an equation you Must convert it.

But the whole concept of a Class and how each object is a class and that class can be extended and methods within it extended or overwritten is really powerfull stuff.