This still works. I wrote about a topic awhile back o help me understand it and when I search for the topic, my post still appears in the search results.
I didn’t write it to get to the top of any search result but for myself so I could understand it. Now when I see the post there, I’m glad that I’m not the only one who benefitted. As other people have pointed out:
Write. Put it out there. Do it for yourself first and not to be popular. If it helps you, it might help someone else. And who knows, someone else might even point out something you didn’t know before.