Blog advantages:
- A blog can be easily seeded, and after a few posts it looks good already;
- For this and other reasons, the ability to backdate posts is essential;
- Blog posts aren't carved in stone. It's perfectly normal to change them later.
In fact if you don't plan to change them (much) anymore, might as well migrate to an SSG.
I've been looking at blogs wrong this entire time
No, seriously. Of course posts are just going to pile up if I treat them as stand-alone and largely unchanging. And post summaries become baggage once they slide off the front page. As for archives, they just tend to grow forever: a different kind of pile-up.
The post should be the summary. Any details should be relegated to a more permanent page linked from the blog: a corner of your digital garden, that you can tend at leisure over time. That is how you reconcile the timely and the perennial, not by forcing wikis to double as blogs or other "clever" schemes.
(See more notes on various other topics.)