Eeep!
I attempted and failed to find a clear answer. I think we might be relatively unaffected for a probably long period of time, as we're not downloading direct from Qt but from Anaconda and Pypi.og, and they will absorb much of the pain. Smart people are saying it will break continuous-integration server offerings like Travis which we do use, and then there's just the general community fracturing which seems likely. However it looks to me like Leo can wait and see what the overall community response is before choosing a path.
The most thoughtful analysis I came across is from a lead Krita developer who's been using Qt for 25 years. In short, his outlook is gloomy:
-matt