AutoCAD web is a serverless web app that does not expose third party APIs. As a serverless app, there are no performance concerns relating to the number of users. This pertains to the editor itself.
For access to the data (i.e. DWGs), the AutoCAD web app uses its own internal storage (“AutoCAD Web and Mobile”), and whichever cloud storage providers you grant it access to. The AutoCAD Web and Mobile storage is designed to be scalable. The AutoCAD web app and AutoCAD Web and Mobile storage comply with the Autodesk security standards.
If you notice any problems let us know.
Jon Page
AutoCAD Design Manager