Option A: applications can continue to do what they’ve done for nearly 30 years and rely on system title bars. This will work everywhere — X11 GNOME, KDE, SwayWM, macOS, Windows, BeOS,… except GNOME on Wayland, and it will feel native.
Option B: applications can choose between GTK 3/4 (not exactly a fan favorite) and get native looking title bars only on GNOME (without extra work — also only supports an out-of-date spec for native window frames on Wayland) or they can use libdecoration (or libdecor or whatever) which appears to be persistently not ready for prime time, and will still not look native in most Wayland compositors.
Honest to goodness, apps should just force themselves into X11 mode on GNOME until the compositor is fixed. The CSD initiative is a broken idea.
Option B: applications can choose between GTK 3/4 (not exactly a fan favorite) and get native looking title bars only on GNOME (without extra work — also only supports an out-of-date spec for native window frames on Wayland) or they can use libdecoration (or libdecor or whatever) which appears to be persistently not ready for prime time, and will still not look native in most Wayland compositors.
Honest to goodness, apps should just force themselves into X11 mode on GNOME until the compositor is fixed. The CSD initiative is a broken idea.