Found a helpful graphic on the topic for the proper shutter speeds to be using for sharp images. I'd say it's definitely not accurate for all people doing handheld photography. A lot depends on hand shake and your ability to hold a camera properly to avoid it.
Charleston, WV. 2017 Portrait by Kezins
I love going back and editing old photos to see if I can come up with better post processing than I did originally. That's definitely the case with this set. Using only Lightroom, I lightly adjusted this photo series to have a color film look. The results were definitely great.