On: Python 3.12.0 is to remove long-deprecated items

[worldsavior]

Telnet does not have any standard security, at least by default. No encryption and no authentication among others.

[an-unknown → worldsavior]

This is factually wrong. There are even multiple different authentication and encryption schemes defined for telnet, see e.g.: https://www.iana.org/assignments/telnet-options/telnet-optio...

Just because some old and rudimentary telnetd or telnet client doesn't implement it doesn't mean it doesn't exist / isn't used.

[worldsavior → an-unknown]

Those are data formats, and a client is needed to support those (on both endpoints). You better just use something modern like ssh instead of hunting for clients (and making sure they're reliable).