Simon's blog is fragmented because it's, well, a blog. It would be hard to find a better source to "keep updated on things AI" though. He does do longer summary articles sometimes, but mostly he's keeping up with things in real time. The search and tagging systems on his blog work well, too. I suggest you stick his RSS feed in your feed reader, and follow along that way.

Swyx also has a lot of stuff keeping up to date at https://www.latent.space/, including the Latent Space podcast, although tbh I haven't listened to more than one or two episodes.