So far it's not Ubuntu dropping support for X11/Xorg; just Ubuntu Desktop as GNOME, Mutter & gdm have opted to drop support in newer versions.
X11/Xorg will still be available for 25.10 & is expected for 26.04 LTS if you're using other desktop/WMs. Other desktops may also opt to drop X11/Xorg, but we'll have to wait and see, as Ubuntu 26.04 is still some time in the future.
My reaction was stunned silence though when I read the discourse post.. though to be honest it was very much expected; the question really for me was was when the news would drop & how I'd feel about it when it dropped.
Evaluating my reaction; I'm feeling loss, the stunned silence I was describing being denial, or the common first stage of grief; and knowing it was coming didn't really help that much.