Absolutely yes. The 100 item guideline is just that—a guideline. It is a recommendation based on our experience of watching merchants build stores. The recommendation comes not from a technical limitation of SiteBuilder, but rather a common sense assessment of the time it takes to maintain stores of varying sizes with various building tools.
SiteBuilder is an easy-to-use tool for merchants. After entering product information in Catalog Manager and setting up your product catalog for exporting, you can import your product information to SiteBuilder. You can then use product modules to create item and section pages with your products. Again, there is no limit to the number of products you can have in a store built with SiteBuilder. Also, when your product information is entered in Catalog Manager, the latest product information will appear on your pages with no need to republish each page.
Where SiteBuilder causes problems is for merchants with larger stores that wish to modify the look of pages. For a store with 20 products, updating the template means opening and making changes to 20 separate product pages (plus any other pages such as section pages, info or privacy pages, etc…). Now imagine a merchant with 500 products. Updating the template would require opening, editing and saving 500+ pages. Again, while there is no technical limitation to this in SiteBuilder, the time it takes to edit 500+ pages for merchants that wish to make frequent template changes makes SiteBuilder a less than efficient tool of choice.
For this reason, we recommend merchants with over 100 products and that wish to modify their templates often, consider using a different building tool such as the Store Editor.