Yeah part 3 wasn't as interesting. He didn't pause & explain stuff anywhere near as much as before. Still, it was worth watching the videos.
Judging by the way he spoke, I'm guessing that a lot of devs have been praising the PS5 because it's been deliberately built in a way that reduces their workload & allows them to do things more efficiently. Things that have been a real headache in the past. That was the vibe I got from him anyway.