I work for an outsourced company representing a large search engine brand. The largest.
I am not on the tech end though. I handle partner relationships. Aka I am the company rep from a tech jugganaut, to people way more tech saavy than me.
I spend my days hoping I don’t get caught out.
Twitter is where it started.
And every ‘hip’ person started talking about sliding into someone’s DM and it became the default application.
PM is still used in professional settings sometimes.