At my last job, a bunch of the older folks did not realize they had a "two spaces" habit.
It's a clear tell.
Saw this meme and thought I'd point that out.
The "two spaces" habit is because that was proper typing etiquette back in the day. You would lose points on on submitted papers if you didn't do that. I still do th two spaces when typing on a computer but use a single space on my phone.