https://en.wikipedia.org/wiki/HTML#H...sions_timeline
Quote:
Presentational markup indicates the appearance of the text, regardless of its purpose
For example, <b>bold text</b> indicates that visual output devices should render "boldface" in bold text, but gives a little indication what devices that are unable to do this (such as aural devices that read the text aloud) should do. In the case of both <b>bold text</b> and <i>italic text</i>, there are other elements that may have equivalent visual renderings but that are more semantic in nature, such as <strong>strong text</strong> and <em>emphasized text</em> respectively. It is easier to see how an aural user agent should interpret the latter two elements. However, they are not equivalent to their presentational counterparts: it would be undesirable for a screen reader to emphasize the name of a book, for instance, but on a screen, such a name would be italicized. Most presentational markup elements have become deprecated under the HTML 4.0 specification in favor of using CSS for styling.
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This is W3C propaganda and retcon due to earlier depreciation of <i> and <b> and then rehabilitation of the tags.
It's arrant nonsense.