Everything in the codebase I maintain at my job is an arbitrary dict and there is no type information anywhere. It wasn't even written that long ago (dataclasses were a thing long before this codebase was written).

There's actually a place where the original authors subclassed dict, and dynamically generate attributes of a "data class" such that it can be used with dotted attribute access syntax or dict access syntax but the `__slots__` attribute of these classes is also generated dynamically so you don't have any auto-complete when trying the dotted attribute access. It's genuinely insane lol.