Threads aren't discouraged by p5p. The docs mispeak. It's meant to be a warning on the heavyness of Perl threads. It's already in the process of being fixed.

Still not fixed 2020-12-02

In reply to Re^4: Can I/O operations on the same IO::Socket be executed in different threads? by Anonymous Monk
in thread Can I/O operations on the same IO::Socket be executed in different threads? by Anonymous Monk

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