Yeah, that's what I was thinking.

deepmacro, before you created Tenno, did you try Org? It supports plain text spreadsheets[1] in Org documents whose content is marked up using Org syntax[2], which is a lightweight markup language like Markdown but with many more features. If you did try Org, how was it lacking?

[1] https://orgmode.org/manual/The-Spreadsheet.html

[2] https://orgmode.org/worg/org-syntax.html

i do my taxes with org spreadsheet i doubt it lacks and you also have the option to get output in html/pdf etc. with babel.

Honestly, no. I heard of it but I never used it. I am sure it has a lot of features that can inspire Tenno, I'll look more into it. One of the main points here was making it more approachable, but it depends on who the audience is.