Why are use warnings; use strict; not default in Perl?

Question

I\'m wondering why

use warnings;
use strict;

are not default in Perl. They\'re needed for every script. If someone (for good reason) need

Answer 1

You can use the common::sense module, if you need:

use utf8;
use strict qw(vars subs);
use feature qw(say state switch);
no warnings;
use warnings qw(FATAL closed threads internal debugging pack
                portable prototype inplace io pipe unpack malloc
                deprecated glob digit printf layer
                reserved taint closure semicolon);
no warnings qw(exec newline unopened);

It reduces the memory usage.