I think El Reg stated it well at the end of their article. Stallman may be a divisive figure, especially in recent years, however no one deserves to go through an illness that scary and difficult to fight, even with modern medicine on their side.

Fuck cancer.

Although Stallman is a controversial and polarizing figure, he is widely acknowledged as a pioneer. Without his efforts to formalize and promote Free Software, there would be no Open Source world today. There have been multiple expressions of concern across the internet, and many people wishing him the best.