Prior to Creo Parametric 3.0 upgrade users could work in multiple workspace sessions (as long as there was enough floating licenses). Unfortunately, opening a new workspace session of Creo Parametric 3.0 now closes all other running sessions workspaces.
This is a rather significant inconvenience for us as we always have multiple projects (requiring multiple active workspaces). This functionality is important enough that we've always paid for extra licenses allowing us to do this. Needless to say, our users and management are not happy about finding this out after we upgraded to the new software only to take a huge loss in productivity.