True, but in my case I think it isn't enough of a Vim-like experience. In that case I would have expected modes I could stay in for longer than a single cell entry.

It would be fine if I'm in insert/edit mode and I can move around entering values in several cells and then press escape to exit that mode.

The reason I think TUIs are attractive to use is because they're more efficient to use. But this one doesn't feel more efficient to use than its GUI counterparts.