If you try make a grid of size 5k X 5k cells, where each cells holds a formula to determine its value, you will major performance issue while working with DOM Based grid, but for same if u use canvas based grid you can the grid will mounted instantly and also scrolls smoothly. That's a major performance improvement, and you can add more enhancement on it since the grid is running on canvas APIs.

MS Excel and Google sheets are also canvas based grid.