For small scripts (say < 100 lines) OOP generally doesn't matter much, but for anything much over that it can provide some really useful leverage. Even poor man's OOP like:
use strict;
use warnings;
my $obj = bless {hi => "Hello world"};
$obj->greet ();
sub greet {
my $self = shift;
print "$self->{hi}\n";
}
can end up saving a lot of time and confusion by avoiding passing lists of unnamed parameters into subs or accidentally doing weird stuff with global variables.
Perl is environmentally friendly - it saves trees
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