Your bikes suit you, so there's really no debate.

The supposed advantages of a road bike are that the curved handlbars allow you to shift hand positions to lessen fatigue, you can lean your torso lower and farther forward to lessen wind resistance and get more weight on the pedal during the downstroke, the skinny tires are fast, and you can pretend you're in the Tour de France.

The advantages of a hybrid are that your hands are always on the brakes, and the wide handlebars allow for more confident steering at low speeds or in tight spots. The upright body posture is more comfortable and gives you better visibility, and it's not necessary to crane your arthritic neck to see ahead. The slightly fatter tires are better for potholes and packed trails than road tires would be.