So, the headless architecture allows to implement separate updates of technologies at any part of the ecommerce platform (front end, back end, middleware) independently and can therefore respond quickly to new technological trends.
In contrast, when new technologies arise for the monolithic system, this system must be changed almost entirely or needs a complex and time-consuming redevelopment.
What else affects the performance of the ecommerce portal in conjunction with the pace of updates? This is the ability to scale the resources for different parts of the platform, or scalability, in other words. Suppose there are not enough resources for some operations on the ecommerce platform. In that case, the ability to easily add software instances and server resources provides a significant gain in productivity and flexibility.
For a monolith, implementing scalability and load balancing are difficult and complicated tasks and sometimes require taking the system off-line for an update. For a headless ecommerce platform, you can add software instances, server power into the desired layer as much as needed without fear of a system disruption.
Besides, with the headless architecture, the load can be distributed across the platform (marked on the diagram with the load meter) — mostly to the fast front end, by unloading the middleware and especially the back end. This functionality is linked to business expectations and deliver product data faster to the end user.