Why don't you want to make a Saas solution instead, a builder based on templates and design blocks (Readymag, Webflow, Tilda, etc)? What are the pros of this a

Why don't you want to make a Saas solution instead, a builder based on templates and design blocks (Readymag, Webflow, Tilda, etc)? What are the pros of this approach? I agree with the comments above, it seems that this model is already outdated and won't scale.