I used to use em-dashes for explanatory clauses--like this one, for example--when using commas would make the sentence difficult to parse due to other nearby commas.
They're only a LinkedIn-ism when used to create an unduly dramatic juxtaposition for an otherwise mundane idea. But now they set off people's AI radar when used for any reason at all.
Perhaps I am biased because I find the use of em-dashes without spaces (as is common in English typesetting) to be inherently ugly so I'm not too unhappy to see their use discouraged.
They're only a LinkedIn-ism when used to create an unduly dramatic juxtaposition for an otherwise mundane idea. But now they set off people's AI radar when used for any reason at all.