It depends upon how simplistic, intuitive and relevant your UI(User Interface) is. There are applications which in spite of providing numerous features, are still considered on top as people’s choice.
It also depends on how well integrated the application is? With the latest trend of microservices you can scale your application effortlessly. Although, the collaborating interface - API needs to respond well to your distinctive features.
One must perform API monitoring to test how well the application’s response time, fault tolerance and other factors are on an integrated front. To know more about API performance, follow this blog regarding relevance of API performance monitoring.
How well your application looks to the end user is crucial and neglecting is like waiting for a potential disaster to happen. Also, with ample variety of web browsers available in the market, end users have the convenience to visit your web application from multiple web browsers.
Refer to this blog to know more regarding cross browser testing and how to perform it?
So, it doesn’t mater how many features youare providing. What matter is how many feature you are able to provide well? Keeping note of cross browser testing, API performance monitoring and efficient deployment of microservice architecture will definitely boost the scalability.