Part that bothers me about Python is no special binding form, that is you could just do x = 3 to add x variable to my environment, and second is not-strict lexical scoping.

From other perceptive, these usually bother me when my functions are larger, and ideally functions should be small. So I take it as sign that I should probably break down my function.

And yeah, tail calls! I expect that from a modern language with functional programming features. Unfortunately it seems there are no plans to add them in Python