What I’ve found is that people over 40 actually show up for work every day. They do it on time. They don’t get an attitude about people telling them what to do. They generally don’t get into petty fights among themselves. They tend to leave their personal lives at home.
When I was a kid (boomer), it was even tough to find a McDonald's type job . . . because there were so many of us. Showing up on time, doing the work and passing a drug test wasn't enough back then.