This always bugs me: why is `args` immutable (tuple) but `kwargs` mutable (dict)? In my experience it’s much more common to have to extend or modify `kwargs` rather than `args`, but I would find more natural having an immutable dict for `kwargs`.
Because python didn’t (still doesn’t, but at this point even if it did backward compatibility would mean it wouldn’t be used for this purpose) have a basic immutable mapping type to use.
(Note, yes, MappingProxyType exists, but that’s a proxy without mutation operations, not a basic type, so it costs a level of indirection.)
In my experience, people who don’t care about tuples are people who don’t understand them. It’s not much about being Pythonic or not (they exists in other languages) but rather about choosing the right data structure for solving your problem. Tuples are much more than a way of making immutable lists, they offer a type-safe and serializable representation of pairs and triplets; something you can’t have with a list. If you don’t use them yet, I really encourage you to document yourself (and again-- in general, not just in Python) because you’re missing something.