[Cthulhu_]

It's easy to underestimate how fast a plain vanilla HTML table can be. It gets a lot more heavy if you start doing things like sorting, column resizing, filtering, and of course it depends on what you have inside of them.

One perf issue I ran into on an older application I'm maintaining was that on render, a callback would iterate over ALL cells to add a drag handle to them, so that a user could change the column width anywhere. That quickly ran a few hundreds of thousands of times.