https://www.forbes.com/sites/briannawiest/2019/11/04/millenn...

https://bgr.com/2018/12/09/millennials-phone-calls-survey/

https://www.telegraph.co.uk/family/mobile-chat/why-millennia...

https://www.inc.com/john-brandon/why-millennials-dont-like-t...

https://www.stuff.co.nz/life-style/nz-life-leisure/110277251...

https://jeffjbutler.com/2019/04/02/why-millennials-dont-like...

https://www.bankmycell.com/blog/why-millennials-ignore-calls

https://medium.com/swlh/why-you-should-never-cold-call-a-mil...

Etc etc etc etc

I literally don't think I've been called unannounced by someone under 40 in a decade. In fact I think it's now something of a social faux pas to call unannounced. Maybe the people around your tables are just really rude?