Re: [csswg-drafts] [css-tables] What CSS is applicable to table-track & table-track-grouping elements

> Ideally, table-row and table-column to work exactly the same way, to
 bring symmetry into this model.

I think this should be an explicit non-goal.  The table model is 
asymmetric; cells are children of rows, but not of columns.  `opacity`
 on a row definitely affects the rows inside of it, but `opacity` on a
 column definitely does not; at *most* it affects the backgrounds that
 the column itself draws.

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