I can attest the abbr is also mobile friendly, although I am for sure open to each browser doing its own UI hinting that a long-press is available for the term
> Spelling out the acronym or abbreviation in full the first time it is used on a page is beneficial for helping people understand it, especially if the content is technical or industry jargon.
> Only include a title if expanding the abbreviation or acronym in the text is not possible. Having a difference between the announced word or phrase and what is displayed on the screen, especially if it's technical jargon the reader may not be familiar with, can be jarring.
<abbr> is not what you seem to think it is. But the "typical use cases" section of your link does explain what it's actually for.
[1] https://issues.chromium.org/issues/337222647 -> https://issues.chromium.org/issues/41130053
Always consider your audience, but for most non-casual writing it’s a good default for a variety of reasons.