Insert latex equation in-line with text in a table in Keynote 10.0

There is nothing in that linked article that offers a glimmer of hope that Keynote 10 will accept equations in its table cells, and in practice, eschews all efforts at doing so. Pages 10 does permit the insertion of equations into selected cells of a table. Numbers 10 rejects all equation insertion, and places the equation as a foreground, floating object over the spreadsheet.

Copying and pasting a Pages 10 table into Keynote 10 purges the equation from the table.

I question whether this is a bug, or a deliberate attempt by the Keynote product team to prevent tabular equations. At least they are consistent with direct, or pasted table equation suppression. You can provide feedback to the Keynote product team from the Keynote application menu.