Do You Update Old Blog Posts Regularly?

Akira Hayashi said:

How often do you revisit and update older content, and has it helped improve rankings?

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Almost everybody is saying the same thing in different words. Updating is not a matter of frequency; it is a matter of selectivity .
That is where the magic happens bcz you work on pages which have gained traction with impressions or rankings and increase the no. of covered intents rather than just updating the content.
If a page has no traction at all, its update will not affect anything. In such a case, it might be better to create a new page.