Yeah, not rendering nodes out of view came up a little early on in the current implementation of infinite scrolling as something I was looking to do. The only way I could think of not rendering previous rows was to lock a specific row height, which was not something I was excited about (and it breaks down even further on nested tables, which have a state independent of its parent grid).

It's definitely something Ryan and I (or anyone else that might want to contribute) will be revisiting in the near future, potentially as a config option.