So far, no, but except for the delivery trip, I haven't ventured far from the local cruising grounds for which I have guides and charts.
On the delivery trip, we went offshore from Fort Pierce to Beaufort, NC, with paper charts, 2 GPS systems, AIS (with basic GPS display and lat/long readout), the Navionics app on my tablet, and GPS phones with various nav capabilities. GPS fixes were being used to track our progress on the paper charts by the "old timers." If they hadn't been along, the paper track wouldn't have been maintained. I didn't see value in the paper charts or the track beyond historical/sentimental.
We did lose one of the GPS systems near the Florida/Georgia border when a "new" satellite appeared in its view that it didn't know what to do with. (I later learned that updates were not available for that system, so I replaced it. That would have been nice to know before starting, but I can't count how many of those nice-to-know things I didn't know on that trip.) Had we lost all electronic nav capability, I'm not sure what good the paper charts would have been. Head west, find land. Once land was located, some paper would have been helpful to locate ourselves along the coast and find an inlet, but a guide covering the landing spot and surrounding area would have been preferred to paper charts.
Thinking back, the paper did give us insight into the offshore shipping lanes and the occasional lights and day shapes that we wouldn't have had without them or the electronics. Without paper and a known starting point, we couldn't have maintained a DR plot had we lost the electronics.
As I've learned and practice in my real job, deciding what you need when cruising can be framed as risk management. Evaluate the risks, mitigate them to the degree you determine acceptable, and be prepared to accept the residual. Having paper is a risk mitigation, but the value of that mitigation will vary significantly with the user's experience, confidence, and supporting tools.