Technically, the study shows the benefit for irradiating the 1-3 node people helps most at the 10 year mark, where it then becomes clear.
I don’t know if I’d be happy with infected lymph nodes for a number of years, when you don’t know when a cancer might show up elsewhere from those “seeds.”
Knowing it helps in all occasions, just not as clearly or quickly with fewer problematic lymph nodes, would push me over to getting the radiation.