I learned today that there is a class design tool in Visual Studio which took some years to figure out. It's not a built-in part of VS2019 but should be. Seeing the class hierarchy in visual level shows "problems" in inheritance very clearly. Although the class hierarchy can be anything you want, but often a tree-like hierarchy is better, from simple to more complex classes.
There are huge stacks of single use classes in both Kaduria and Teemu which looks kind of funny. I think with this new tool it's easier to fix class hierarchy and it's going to be my short term life goal for sure.
I don't yet know what to do with Teemu's github adventure. I actually hate github and source control, because as we saw anything can happen. I feel it's also unneccessarily complex system, but that's typical in the linux/open source scene. Everything is super complex and obfuscated for no clear reason.