Hello Jansi,
many thanks for the reminder.
Unfortunately I neither did not get the exact answer for my question nor there is not a appropriate answer from SAP side.
Especially the new information that also the standard support customers can also use the new Monitoring and Alerting Infrastructure make the usage of one central Solution Manager for Service provider for monitoring all the customter systems from there even attractive.
It will be great to get some official statement from SAP side...
Thank you!