Old age?

Southgate News reports that attendance at Friedrichshafen was down on last year. Could this be because the amateur population is now mainly old men who find travel harder? If numbers are down next year too, it would not surprise me.

See http://southgatearc.org/news/2018/june/attendance-dips-at-friedrichshafen-ham-radio-2018.htm#.WyfU2fZFxMs