I remember when this happened, but I don't think it was the impetus for high-rise regulations. I've mentioned in several posts that I'm a native New Yorker, and as it happens I live on the 11th floor of an apartment building. When Clapton's son ran and kept running and went out the open window, there were already laws in NYC requiring safety bars for all windows in buildings that had at least three stories. My 38-year old daughter was nine in March 1991 when Clapton's son died, and the law here requires window bars until all children are over 10 years old. As it happens, I still have the bars on because I just never took them out. Now I have three grandchildren, two of whom are still younger than ten. I guess eventually I'll remove them when they are all old enough.
That law was in place when Clapton's four-year old son died so tragically. Unfortunately since that home was a condo and not a co-op like mine, they were free to choose whether or not to comply. That to me is nonsensical, and you may be right that it was an impetus for condo associations to adhere to the NYC law.
To the best of my knowledge, these laws exist because children who are no longer in a crib can wake up and do crazy things while the parents are asleep. If there were no safety bars in the windows, I know for certain that neither I nor any other adults in the family would lift any children up and over the windows or the terrace.
Happy New Year to all of you. I won't be in Times Square but if any of you are coming, the security rules are necessarily strict, but the weather is decent.
May 2020 bring fewer tragedies to write about on Websleuths.