We evaluated m-stack. So it was a demo. But it was simpler yet similar to Grafana. 

I believe my old company chose Grafana because they initially wanted to monitor the traffic and know the firewall and scaling.

In the SRE model, there are many tools evolving but the solution is a good starting point for SRE with Spring Boot. Once you become familiar with SRE and are clear about the terminology, you can explore other products. Other users will say ELK or Dynatrace are good, but the best solution depends on your requirements. 

SRE is a journey that is uncovered as you progress. The solution is adaptable, easy to configure, works for microservices development, and integrates with Spring Boot so it is the best product for starting points. 

We considered Kibana before we chose this solution.

My company chose Grafana over other products in the market considering its integration capabilities with Zabbix, good documentation, and the many topics about the tool that are available on the internet.

Our subcontractor has suggested that we move to InsightEye because Grafana only visualizes the dashboards whereas InsightEye is more proficient and has more functionalities. 

We chose this solution because it met the requirements of visualizing and monitoring to make decisions. We found it had very good industrial usage from the reports we read when Space X launched.

We did not evaluate other solutions.