The display:table css properties are exactly equivalent to the display model of html tables. They were specified in CSS2 which became a recommendation in 1998, which is 17 years ago (!).<p>But due to the IE6 dominance and abandonment it took many years before this part of css was broadly supported by browsers, so developers had to either use html tables (even when not semantically appropriate) or use hacks like floats (which was not designed for this) to achieve a table-like layout. So the age of hack was due to browsers not supporting css, not to to deficiencies in css as such.<p>That said, html tables never displayed identically across browsers before css. There were lots of corner cases e.g. with the interaction of fixed and flexible columns. Which is not really surprising since the display model for tables were never specified in the first place before css.