Its done already
This is fully open source
This is fully open source
Yes, NocoDB[1] allows to transform your own databases into Airtable like smart-spreadsheets. It is easy to get started - please try it out.
I played around a little and am missing actual spreadsheet functionality - like the ability to do calculations, or other manipulations that you could do on tabular data in Excel/Google Sheets (and presumably Rows). Am I missing something?
You can do calculations by creating a column with formula field.