Group photos tend to be documentary in nature i.e their primary purpose is to record who was present at some place and time.
For that reason, I take a quick group photo with my point-and-shoot camera as an attendance record whenever I’m teaching. It cures the most camera shy instantly.
Advancements in digital photography used to be measured by the megapixels that its sensor can capture for each image.
Thank goodness that race has ended at least in the DSLR market.
Now, it’s about how good the image looks at high ISO.
It’s not that I have an aversion to digital noise in an image.
I lived with digital noise for years when I worked in news because there are lots of instances when flash photography is not allowed yet I had to had to produce an image to illustrate what took place.