Store at CMS WordPress
WordPress has become the basis for all website configurations. E-commerce is no exception. There are many solutions based on the WooCommerce plugin to set up a successful online business.
And productivity?
How many products can the store "pull"? That's not quite the right question. It is much more important how many visitors at the same time will be able to use the site. And on this, first of all, it will influence the technical characteristics of the hosting—10,000 items are not the limit for WooCommerce.