This is the biggest issue with CSDs aside from the wasted space coming from oversized buttons. Every developer’s gonna put different, inconsistent things in that title bar.

The close window button is basically universal, but what if I want to minimize the application? What if I want to pin it to all workspaces, stack it on top of other windows, or roll it up? With CSDs there are no standards.

Custom tags can also be added to pretty much every element of the UI.

Quod Libet’s been my favorite player for a long time due to how customizable it is and how well it scales to extremely large music libraries.

Xfce is very replicable. Moving my install to a new system usually involves little more than copying the config files between home directories.