I have an Excel workbook system which uses formulas to a considerable degree and relies on several VBA modules. At present I pay £80 each year for Office 365, but I would rather make contributions to LibreOffice provided that this app will run reliably on Calc. I realise no one can give a definite answer to this without studying my app, but any pointers to possible snags would be useful before I take the plunge and ditch Office.
One of the big advantages would be to be able to pass the app to colleagues (I am treasurer for a local social club) who do not have and cannot afford Microsoft Office.