AG-Grid is not bad, as in it’s better that some other grids and I understand datagrids are a complex problem to solve, not least because of having to add virtualization into the mix. But the API has many areas that leave a LOT to be desired. I have developed over 60 AG grids and there are many frustration points. I look forward to composable, fully controlled grids like https://github.com/tannerlinsley/react-table becoming mature. Also AG offer no support, even though I work on behalf of one of their biggest customers they are very tight with giving access to their support forum.