I assume you know this, but just to be sure: The "before" state only happened in a fallback codepath when using a legacy application, i.e. an X11 app in the mod

I assume you know this, but just to be sure: The "before" state only happened in a fallback codepath when using a legacy application, i.e. an X11 app in the modern Wayland-based desktop. When using modern apps, or when using the entire desktop in legacy X11 mode, this doesn't happen. Most legacy X11 apps in active use are actually games which tend to be fullscreen and not resized, so it wouldn't happen that often for many users. (That said, sure, I can also respect the stance as I tend to place a premium on glitch-freeness too.)