Despite Over time, modules in Perl can become obsolete, or superseded by newer modules. Furthermore, despite being over 15 years old, Perl 5 continues to grow. Much of this growth comes from Perl's practice of assimilating popular CPAN modules into the core language. Modules that are not part of the core Perl language must be explicitly included to be used by a program, but modules that are part of the core language need not be. When a module has been assimilated into the core language, the original module is still available in CPAN.
Modules that have become obsolete, superseded by newer modules, or integrated into the core language are considered deprecated. , but its use is deprecated. Do not import deprecated modules. It is perfectly valid to use their features without importing them, as they are now
If a module becomes deprecated because its features have been integrated into the core language, then their features may be used without importing the deprecated module.
Here is a list of CPAN modules that are should be considered deprecated, according to Perl::Critic.
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