It's pretty neat but does have a number of bugs. The packaged version also doesn't have xls support compiled in (at least on Fedora) which is unfortunate, though building is fairly easy[2].
I love the idea of it though, so I'm really hoping these issues get ironed out! I'm happy to help contribute if maintainers are willing.
[1] https://news.ycombinator.com/item?id=47457009
[2] https://github.com/andmarti1424/sc-im/wiki/Building-sc%E2%80...
And it's not like the terminal can't be a greater data processing tool, but you have to use different paradigms.
Still from an esthetical perspective I love those simple TUI interfaces. They invoke a weird sense of comfort in me that I can't fully explain.
I've been wondering about this too. I think a great TUI could get it done though, but it remains to be seen how it could really stack up. If I didn't have so many projects already, I'd give this a shot because I would really love a "vim" for spreadsheets
[1]: https://github.com/andmarti1424/sc-im/wiki/Building-sc%E2%80...