Yes, re-hosting is an option but that is not really what we want. A re-hosted server still has more management & cost overhead than a hosted service. For comparison, you can look for services such as Datadog, AWS CloudWatch.
I believe there will be a significant drive in this direction in coming years and Solarwinds will lose a significant market share if it doesn't have a presence in cloud. It will be exciting if Solarwinds can bring its wide-array of monitoring/alerting capabilities to the cloud.