I have a friend who is in his 70's and has shaky hands. His daughter bought him a digital camera. When he's shot a bunch of photos, he either gives it to me to download the photos--he's a friend--or he does what he did with film and takes the camera to the camera shop, hands it to the young lady, and says, "Print these."
He really has two problems. One is the lack of a viewfinder and the other is understanding "modes". He sets it on "green" and shoots. Nighttime, indoors, outdoors, all the same. A lot of his indoor shots are blurry and I thought at first it was shaky hands but it's shooting at 1/15th of a second.