PhD physical scientist here -- not in the quantum area, but with some familiarity. Best take I've heard based on my own "partially informed" understanding of both fields is -- (a) it's a concern but (b) it's not an imminent threat. This field isn't anything like modern semiconductors where you have Moore's law, etc. A variety of different approaches to the actual physical platforms of QC are still getting investment, which says to me that the field hasn't even settled on a single "reference hardware" implementation the same way that semiconductors have...