Some of these posts have been a lot of work and contain many subsections. Recently, I have found that I would like to extend some sections within these posts or update them with new information. However, if I just update in-place without changing the post's date, it feels not quite right. Updating the post's date to now() also seems far from ideal.
Admittedly, I would like my additional work to be rewarded with some additional views. People who have liked the original post would likely want to be aware of the updates somehow. However, I do not want to engage in unfair SEO tactics and just re-release my posts all the time.
So how do you handle this with your own blogs? Do you just update the post? Do you change the post's date? Do you release an additional post and mention that there is an earlier version (e.g. My Post V2)?
I've only done relatively small changes so far, so hopefully that is fair to people who already shared/liked. For typos/style I just change it, for bigger additions, I'll explicitly mention when it's updated.