I like ECharts a lot and generally, it was incredibly easy to use and customize. I tried a lot of alternatives that weren’t nearly as full featured. It’s really got most anything you’d want included in outta the box.

With that said, I had trouble getting it to stream updates, and was having big performance issues with the dataset I was throwing at it (full telemetry from a racing sim roughly every 12ms). I did not make any attempt to refine the data before delivering it so YMMV. I eventually switched to Plotly and D3 to get better performance, but definitely missed the ease of use.