Hi, so i recently bought the macbook pro retina 15 inch (mid 2015) after have used the macbook pro from early 2011 for many years until it finally died recently.
The new laptop is fast and looks very good but my scrolling in google and safari seemingly at random goes from 60 fps to around 20-30...
So the choppy scrolling returned to the current technology preview. "Stable" version is no better.
Here's the link to the previous TP ver. which I've found to be the smoothest by far as far as Big Sur goes...