TOS is showing volumes in Feb that were roughly equal to today, both in SPY and ES.
Either way, I was surprised when someone told me the news (GS), checked the charts, and found no evidence that it affected market direction. It was a down day to start with, and acted for all the world like a normal down day, breaking for good at around 10:30 or 11 AM, and then going into position squaring mode in the afternoon session, as normally happens on a Friday. I remember very distinctly the Friday before the Monday of 1987, and when it was over, it felt like something different had happened. On Wall Street Week, a popular TV show back then, Marty Zweig was asked if it was a crash, and he said "Yes" without hesitation.
This doesn't feel the same at all.