For SME/Enterprise, WooCommerce is not even listed on the Gartner quadrant [1] — so whilst the software might be fully capable and open-source, it's not represented at this level whereas BigCommerce and Shopify are.
The gartner quadrant is mostly pay to win, so who really cares about that one? I'd at least not make any decision solely, or to a large part, based on it.
[1] https://ok.commercetools.com/hubfs/Images/Website/EN/Webinar...