Recollections based upon when a project I worked on was thinking of moving to a web based tool:
Grafana does not work well when you are graphing things with high refresh rates, as well as data where different measurements don't necessarily line up in time.
OpenMCT handles the latter situation better while having much more configurability, but still struggles with data that is frequently updated
Agreed. From what I gathered when I looked at it a while back two points are: This expects you more to provide your own data sources vs Grafana having a bunch of ready-made ones, and this is a bit easier to customize with custom elements etc, but it would be great to get information from someone with actual experience with it.
Its UI seems cluttered to me. Texts on menu items on the right clipped which makes it hard to read. Also every graph page has button screen at the end of the viewport which also hard to locate at first. Color scheme is good though.
It is much simpler, for once. Just a Javascript library, basically, not everything and its dog only usable from Docker, like Grafana/Kibana (this accidental complexity is a main reason I don’t adopt this stack).
The first win is a cooler sounding name and backer credentials.