No, baguettes were always baguettes, it’s just that the Balladur ‘bread decree’ of 1993 defined the ‘baguette tradition’ as being only made of flour, yeast, salt, and water. No other ingredients. That was because, in the period preceding the decree, bread in general and baguette in particular had become anything imaginable but proper bread, with lots of additives that have nothing to do in a bread dough, ever.
However (there was a catch), ‘baguette tradition’ was by no means exclusive in terms of baguette, since all boulangers and industrial bread factories could still keep making ordinary baguette any which way they wished.
The situation has remained the same since then: ‘baguette tradition’, more or less successful depending on the baker, sold at a higher price on the side ‘of just baguette’, also of more or less good quality depending on the baker.
Ironically, some ‘just baguettes’ can be better than the ‘baguettes tradition’ in the same boulangerie. ‘Tradition’ can sometimes be tough and dense.
And, as I wrote above, ‘baguette tradition’ is a type of modern bread, very different from the traditional baguettes I used to know as a child, which were made with levain or sourdough. Because flours are now different, ingredients are different, techniques have changed. There lay the real secret of French bakers: crusty, crispy, light, delicious bread from a levain dough. Most levains used today are unable to produce that lightness. I particularly remember the white baguettes made in the Western regions of France (Charentes, Vendée…) back in the 1960s, crisp, light and luscious with a lovely, slightly acidic taste. Best bread in the world, now disappeared.
Pain viennois is a completely different animal and is still available in boulangeries. It is an old, traditional product too, shaped like a baguette (or a thinner ficelle) but with a smoother surface and deep cuts across the top. The bread dough includes small quantities of milk, sugar, malt, and butter. The flour is of a certain type. It was created in the first half of the 19th century when some Viennese bakers came to work in Paris, using Hungarian flour. It is not steamed before baking, just baked, but it is technically close to the ‘pain brioché’. It is halfway between classic bread and ‘viennoiseries’, i.e. brioches or croissants.