I was satisfied with the old style, which seemed stronger. The new style seems visually like an old sepia photo in comparison. I don't particularly like it but accept that I might get used to it. However, it also gives an impression of having significantly more blank space around stuff (although I don't know if that is actually true), which to me is bad because it means having less information per screenful, needing more scrolling and only having a smaller window into complex discussions.
I used to run a simple website myself (for the Havant Orchestras, up to mid-2024) for which I wrote everything directly in HTML, PHP and CSS using Notepad. "Web experts" kept telling me that the "modern" look was minimal with a lot of white space, but feedback from users indicated they liked having lots of stuff visible at the same time, minimizing scrolling and links to other pages. But everyone agreed that the look was less important than the fact that it worked; in my case it provided the right information in a way which was easy to find.