True, but many programs and services on your computer may rely on the "system" Perl to do their jobs. Switching wholesale to a newer Perl may very well cause all kinds of havoc that will be difficult to trace. I'd rather not mess around with such global options, unless there is absolutely no other solution available.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
My blog: Imperial Deltronics