If you learned a couple airplanes as an O1 in the training pipeline, and then flew one airframe for 20+ years, you're not automatically going to be in the mental mode to learn a new one at age 50+, that's going to take some work and adjustment. Lots of things you take for granted are different.

That's one area where career civilian pilots have an advantage, after 4-5 transport category type ratings you know what to expect and how to go about it.