[$] The return of None-aware operators for Python

The saga of the None-aware (or null-coalescing) operators for Python
continues. We last looked in on the topic
a little over a year ago and noted that either adoption or a clear
rejection of the idea might help tamp down its regular recurrence. That
has not happened, so, predictably, it was raised again—and does not look
any closer to resolution this time around.