Cool to see this here! There are quite a few other terminal based spreadsheet people have been doing over the last few years.

Most notably:

https://github.com/andmarti1424/sc-im

Has been in HN often, most recently:

https://news.ycombinator.com/item?id=47662658

New takes: https://github.com/zaphar/sheetsui https://github.com/garritfra/cell