When Gradient Tool is active, make holding Alt switch to Eyedropper tool
If we hold Alt when Gradient tool is active and there is a stop selected, we can click with Alt in Swatches to apply it to the stop (although no cursor feedback or hint signals it can be done). Besides this function, Alt+click is used for nothing...
Use it to temporarily switch to the Eyedropper tool. This is a standard approach in many apps, it’s fast to learn, and just convenient.
AdminEgor Chistyakov (Admin, Adobe Illustrator) shared this idea