My current forum, no, but a couple of my past ones did and then some. Not that it counts, but the chat on my current forum is nearing 500,000 messages, lol.
Not yet. I remember a forum that I used to own that I had to make the tough decision of closing in 2017 did hit that amount though and I was super happy about that when we did hit it as I had the site from 2009. By the time I closed the forum, we had 151,413 posts altogether. I am hoping to be able to hit that again one day 🙂