There is no waiting for compiles and links - just edit and run. Dynamic storage allocation with garbage collection is fundamental to Euphoria.
Variables can easily grow or shrink in size.
Variable types can be as rigid or as flexible as you like. You can specify the precise set of legal values that may be assigned to any variable. You can easily write generic code that works on any type of data. Euphoria programs are not constrained by any 640K or 64K memory restrictions for which MS-DOS is infamous. A statement-level profiler is included.