XPath 1.0 is a pain to write queries for. XPath 2.0 adds features that make it easier to write queries. XPath 3.1 adds support for maps, arrays, and JSON.

And the default Python XPath support is severely limited, not even a full 1.0 implementation. You can't use the Python XPath support to do things like `element[contains(@attribute, 'value')]` so you need to include an external library to implement XPath.