And GNOME used to have them, too: https://upload.wikimedia.org/wikipedia/commons/9/9f/Gnome-2-22_%284%29.png
I like the looks of your window manager. That's using Wayland, right? The only thing on this screenshot to critique is all that wasted space of the windows not making use of the full screen!!@1 At least the file browser. 8-)
This drives me nuts when my workmates share their screens. I really don't get it how people can work like that. You can't even read the whole line in the IDE or log viewer with all the expanded side bars. And then there's 200 pixels on the left and another 300 pixels on the right where the desktop wallpaper shows. Gnaa! There's the other extreme end when somebody shares their ultra wide screen and I just have a "regularish" 16:10 monitor and don't see shit, because it's resized way too tiny to fit my width. Good times. :-D
Sorry for going off on a tangent here. :-) Back to your WM: It has the right mix of being subtle and still similar to motif. Probably close to the older Windowses. My memory doesn't serve me well, but I think they actually got it fairly good in my opinion. Your purple active window title looks killer. It just fits so well. This brown one (https://www.uninformativ.de/blog/postings/2025-07-22/0/leafpads.png) gives me also classic vibes. Awww. We ran some similar brownish color scheme (don't recall its name) on Win95 or Win98 for some time on the family computer. I remember other people visting us not liking these colors. :-D