I wish Touch ID would work reliably for me - it is so convenient. I tried all my fingers, both hand, with no success. According to an Apple tech assistant, the prints of some older people can become “less well defined” over time (he avoided saying “dry and wrinkled”
Older people can run into issues at work too. My sister, who worked as a nurse until she was close to 70, often had problems opening hospital medication cabinets which relied on touch id. It was an annoyance for the tech staff, as apparently a number of older people had problems with the cabinets. I’m hoping facial recognition will resolve the problem.