Well you could use it that way by adding stuff to your favourites. A largely unused but useful feature of HN.

I do this sometimes. Enjoyable to read through it once in a while.

I literally posted my last post, so I can add it to my favourites on HN.

HN has a favorites feature?

For posts, it's in the list of button links under the post title at the top of the discussion page. For comments, you have to click the timestamp first.

Note that favourites are public and anyone can see what you added to your list. If you don't upvote spuriously, upvotes can also function as a private favourites list.

I totally didn't know/forgot that I can get a list of everything I upvoted from HN, but yeah, there it is on my profile! That could have saved me a lot of time in the past trying to figure out "what was that thing again I saw on HN last week?"

I've been using upvotes as a way to save things, and then using a script (https://github.com/anishthite/HN-Saved-Links-Export) to export them to json so I can search through them.