Ecom site. Originally had 135 pages for 126 products ranging from $xx.xx to $x,xxx.xx.
Now has three pages. Index (with everything in clear marked anchors/sections, an about page, and a check out page.
A specialty niche where the big items begged for "attachments, etc." for performance and usability and that's where this change in format made a difference in overall sales.
I've run this redesign for 90 days and saw a 101% increase in sales/revenue because the visitor could get to the item via a SE search (anchored/sectioned) or just scroll through the landing page. All items are fully described but, other than a total of three images, 1 of which was a logo, no other images are visible unless the visitor "Click for an image of this product" did that, thus the images are available in search engines, just not displayed on the actual page ... which, even at 160k loads like lightning, even on mobile.
This might not work for all ecoms, of course, but it might provide a thought on how some consolidation can make a difference and give the shopper more views of what's on site.
As for the search traffic, it is still rising as that "one page" is RICH in everything regarding that niche and is not just "stuffed with keywords".