Older aircraft have the Flight Engineer position, which is the 3rd or 4th person in the Flight Deck. Modern aircraft do not need flight engineers because of the improvements we've been able to make to aircraft reliability, longevity, and ease of use; but at the time, they were worth their weight in gold and absolutely essential for any flight.
Current-generation Boeing aircraft have what's called a "moonlit" configuration, which are switches with lights in them. When the lights are white, everything is okay. When they're yellow or red, something is wrong. When the lights are off, that system is off. Very easy UX.
This is "we thought about it, and decided to keep real mechanical tactile switches" but also "behind the scenes, these may be like the apple mouse: there's a widgit to go "THUMP" when you press it"
Given how many aircraft are fly-by-wire the physical tactile component of a lot of these must be notional, except for the ones which have fuses next to them and are literal cut-outs. You have a switch with a bump, which goes click. The valve 20m away quietly gets turned on by an actuator. The valve completes a circuit to a sensor, which sends a databus signal and the light in your tactile switch comes on.
Current-generation Boeing aircraft have what's called a "moonlit" configuration, which are switches with lights in them. When the lights are white, everything is okay. When they're yellow or red, something is wrong. When the lights are off, that system is off. Very easy UX.
EDIT: Photo of the 787 Dreamliner overhead panel showing almost everything in yellow. https://media.wired.com/photos/5b33588d9a7504731f8815f5/mast...