1. Ok Great!, If you are ok with the response from your hosting provider, then you can go with it.
2. By default, every CMS has different classifications and WordPress is one of the most famous and useful CMS from others. It’s built with a structure like this, so you have to recheck and delete the not necessary sections from your site and recheck it, and not only by our theme but WordPress default generates some images and content as well, for different purposes.
3. Yes you are right, that lazy load option is only available in XStore widget/element for the products and not in WooCommerce/others widgets/elements.
And we have the general Lazy load option as well in our theme options which applies generally on complete sites not on any specific widget/element.
Regards 8Themes Team.
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