An amazing article which persuaded me that Tcl is an excellent language: http://t.co/Lw54Go2pM8
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In praise of Tcl, and reflecting on syntax features for a good command shell: https://yosefk.com/blog/i-cant-believe-im-praising-tcl.html
The Matter protocol is excellent for puns.
"Does it Matter? It doesn't Matter."
TIL Tcl has a notion of 'safe interpreters', a mode where you can run untrusted code in a sandbox: https://www.tcl.tk/man/tcl8.4/TclCmd/safe.htm
Not many programming languages have this, but it's way safer to include in the implementation than try to build as a userland library.