according to the results of my testing and the manner the server has it's FPM configured, 100 people can post at the precise same microsecond and the site won't buckle. this isn't 100 people present at the same time, this is 100 people hitting 'post' or some other action, maybe navigating to another page or thread, at the precise same moment. there can be thousands on the page at the same time- hell there can be tens of thousands....
the server is set with 16 2.3mhz processors on 32GB of RAM, and 1TB of storage space on a SSD drive. i also run a cache script that takes massive work off the DB, making it less likely to stumble. then, sitting in wait are other servers that will come online when (if) the site 'flares' with traffic, and shrinks back when it doesn't need it.
we're pretty damn stable.
last year you guys may recall long pauses after hitting post... that was a result of bugs... those bugs are largely if not all gone now, and the error log usually only has contents when someone mistypes their password, or the security apps decide to challenge you a little more (a way to keep robots from figuring out your passwords).
......................... all of this said........................
more traffic is and would be nice... more exposure to the limited adverts i've put on this place will certainly allow it to pay for itself in whole instead of in part...... but i would hate to see a shift from quality to quantity. good folks? hell yeah.... chest beating mouth breathers? not so much......