Yes, you are right, of course. I guess I was not sure which way the OP was leaning. I just presented at our annual FAE training, and that format was ~100 people but a single presenter. At my company, and the others I have been at in the past decade or three, we have Polycom systems that look very much like your last picture, with multiple (1 - 8) mics placed up and down the conference table.
"After silence, that which best expresses the inexpressible, is music" - Aldous Huxley