[beanpup_py]

No, it adds a new merge (|) and update (|=) operator to avoid using

    {**d1, **d2} 

because it apparently looks ugly[1].

[1]: https://www.python.org/dev/peps/pep-0584/#d1-d2

[privateSFacct]

And in doing so creates multiple ways to do the same thing which is SUPER SUPER annoying.

There has been a recent effort to add all these new operators that don't actually let you do anything you couldn't but now you can confuse everyone by doing it in other ways.

[kzrdude]

Python doesn't use formal interfaces. This makes dicts implement unions in a duck typeable way - the operators.

[py3001]

instead of actually useful features like dict deconstruction

[banannaise]

The bigger reasons are discoverability (as noted in the section you linked) and the ever-vague notion of Pythonic-ness.

{d1, d2} is not intuitive to a primarily-Python developer, and looks nothing like typical Python. The dict unpacking operator it uses is almost never seen outside function arguments.