Hi @webdev,
I gave it a try today ! 
I must be however missing something since the google dev tool network shows me no progressive image loading, everything is loaded on page load, strangely.
Here is a video recording:
Here is my read-only link:
https://preview.webflow.com/preview/sticky-section-f38b32?utm_source=sticky-section-f38b32&preview=836a8217234897977eb5df2ab6f40c88