Typically, MEAN and MERN stack apps are built/compiled for production thereby making their deployment using SPanel's existing functionality a straightforward experience. Today, however, PHP-based control panel user's, like SPanel's, are beholden to the cloud-based MongoDB Atlas service and the IaaS providers it relies on. While it is possible to utilize this service for free during development, it is impractical to do so during a more sophisticated production environment.
Personally, I think SPanel has plenty of competitive brand promises the vast majority of which it delivers on in full. Depending on the technical considerations, which I will leave for further open discussion, developing such a feature and utilizing it in competitive marketing may be a relatively low-cost, high-ROI project that could spur customer loyalty... not just interest and/or experimentation.