While known for his amazing landscape photographs, he was also a major innovator of systems and techniques. Along with Fred Archer, Adams developed the Zone System for determining optimal exposures. He worked as a long time consultant to Polaroid, and unknown to many, made thousands of photographs using the Polaroid system.
While Adams died in 1984, about a decade before the digital camera was generally commercially available, with the Apple QuickTake and the Kodak DC40, I believe he would have, at the least, seriously experimented with them and would have likely embraced their use.