Hey Patty,
The Classic Parallax isn’t really smooth even since then. I have X 6.5.6 in my test site and can see that the scroll is a bit jagged if you really scroll slowly. Scrolling fast, it isn’t noticeable even in your site.
The Smooth Scroll extension won’t help in this case because it’s related to CSS performance. It will, however, make the V2 Parallax animate even better. More on that below.
The “jaggedness” is because the Classic Parallax is based on the old technique of using background-position
. The Parallax effect of the new Section is based on CSS transform
which performs better.
What I’d recommend is you rebuild your page using V2 elements. In the video below, you’ll see that the Classic Section (top) is not smooth compared to the V2 Section. Smooth Scroll is enabled in that setup to magnify the effect. If you see a bit of lag, that is because my machine is not equipped to record smoothly but it’s really smooth on my end.
Hope that helps.