It's an app that has been worked on on/off for 13 years, so certainly not intended be "proof of concept".. but yeah, it's a 1 person OSS side project, not a commercial app with UX designers on staff.
If you have specific ideas about what is so limiting, please file a github issue.
I liked the way how you can do calculations. But there are not a lot of functions available. Excel has hundreds of functions. I wasn’t even able to calculate an average (sum I could do). Or something like pivot tables.
I totally understand it’s just a one man project, but I would really like to see some of those amazing concepts in a commercial application at the scale of Excel. That’s why I called it a proof of concept.
If you have specific ideas about what is so limiting, please file a github issue.