Web apps allow for greater cross system support since they can be utilized on any system that has a browser and access to the internet. Another benefit is that none of the code is hosted on your local system (except the client side which is served to you in the browser). Web apps don’t necessarily lose any functionality, it just depends on the goal of the application. Web apps still have server side (remote) applications that serve the web app to your browser and which can perform the lower level functionality on the host system.