Javascript is not so often used as a teaching language. There are many languages which hammer worse practices than either such as POSIX shell scripts, but they

Javascript is not so often used as a teaching language. There are many languages which hammer worse practices than either such as POSIX shell scripts, but they are seldom used as a teaching language. Python is in the unique space of having made horrible design decisions but somehow often used as a teaching language. One would assume that programmers are to understand such concepts as block scoping rules and the difference between lexical and dynamic variables. — how is Python to teach them that?