I have a similar relationship to Grafana as I do for Prometheus; love it for my home and I've got some very useful graphs for my home network, but it's almost unusable for work due to its speed degradation the moment you start adding more graphs. Again it's probably due to my lack of knowledge around some of the Prometheus functions for reducing the amount of data returned, but it would be nice if it could handle some of that automatically rather than just grinding to a halt.