At my son's band concert the other night the timpanist was using his iPhone to tune the timpani. They also attach their phones to their instruments in marching band instead of lyres to hold paper music or marching coordinates.
My dad was a high school band director for decades and I remember him writing drill with a lightboard, protractor, compass, rulers, etc. Computers just didn't do any of that stuff quite yet back then. When he started using computers for drill, he and his assistant brought their office Mac home to our house to finish it up one summer and they had to pause for a couple days because they ran out of RAM to run their drill and had to order more overnight air before they could finish up. lol