Sure. Sometimes, people use TLS to implement Lisp-style "dynamic scope" in an effort to reduce the amount of information passed from call-frame to call-frame vi

Sure. Sometimes, people use TLS to implement Lisp-style "dynamic scope" in an effort to reduce the amount of information passed from call-frame to call-frame via explict parameters. This approach suffers from the same drawback that dynamic scope does, and it's usually (but not always!) better to be explicit.