Real User Monitoring (RUM) is one of the two fundamental constituents of Digital Experience Monitoring (DEM), the other one being Synthetic Monitoring.
Enabling the New RUM Experience has no impact on your current data capturing, dashboards or alerting on Dynatrace Classic RUM.
As this functionality is currently part of our Preview program, it is governed by our preview terms. The currently offered data model, apps, features etc. within the preview are not complete and may be significantly changed until global availability.