i've noticed this myself. the common denominator seems to be people who are immersed in social media.
(www.eater.com)https://www.eater.com/24022477/why-is-everyone-saying-welcome-ini think this greeting was assimilated from authentic culture and adopted into corporate culture to contribute to corporate cultures veneer of authentic hospitality. this was programmed into their new electronic culture. this is the level of manipulation we face.