When I select and copy a range of cells from an XCEL spreadsheet into the Joplin WYSI editor, the cells are reproduced accurately, I think this is really cool. When I apply borders to the same cells before copying the borders are shown too. And it has some advantages over creating tables in Joplin, adding a screenshot of the cell range, or attaching the whole XCEL sheet to the note.
Could a dev tell me whether this is just a welcome side effect upon which one cannot rely. In other words, could it be that notes like this may 'break' in future versions of Joplin ?