I hear more old timers using 3rd person, more or less referring to we or us as themselves as a radio station, not as I or me as an individual operator.
Some friends who speak to each other are referring to themselves and their family, for example, instead of specifically listing the XYL and the "harmonics", it's just "we're" doing well today.
I think, in some rare cases, there are hams that have a close personal relationship with their station equipment, and talk to it, even when it's not turned on.
So perhaps in those cases, "WE" refers to themselves, along with various equipment in the shack that they consider part of their immediate family.
Anyhow, it looks like newer hams seem to have carried it along, just like they heard people doing long before.
Now go back and ask about people that send FB, or "Fine Business", not mentioning what business, whose business, or what kind of business.
Then there's everyone that instead of just 73, say "Best 73's".
That's like saying Best-Best Regards'ses, it's saying double best and making it plural to boot.