Also, for most operations, touching the screen is only to select the field that you want to modify, such at heading or altitude bug on the AI screen, or selecting the CDI or input on the HSI screen. Once the field is touched, you make inputs via the concentric knobs, so there’s not a lot of touching the screen in flight. It becomes intuitive quickly. (My GI 275 is driven by an external GTN 650 Xi, so I don’t use an internal GPS and don’t know if this would require more touch-screen button pushing.)