According to the abstract of the article, there were 2 groups of patients.
One group had median values of 8.5 months for progression-free survival and 13.1 months for overall survival.
The other group had median values of 8.1 months for progression-free survival and 15.6 months for overall survival.
Overall Survival (OS) measures the time until death from any cause.
Progression-Free Survival (PFS) evaluates how long a treatment can delay disease progression or death.
So at least most of the patients from the study have died, because otherwise median values could not have been computed.
Thus the treatment had provided them a median life extension of about 3/4 years. The lucky ones probably have got more than an extra year.
Your numbers are a little off. The NEJM article was published a few hours ago: https://www.nejm.org/doi/full/10.1056/NEJMoa2605555
RAS G12 population mOS: daraxonrasib 13.2 months / chemotherapy 6.6 months Overall population mOS: daraxonrasib 13.2 months / chemotherapy 6.7 months
RAS G12 population mPFS: daraxonrasib 7.3 months / chemotherapy 3.5 months Overall population PFS: daraxonrasib 7.2 months / chemotherapy 3.6 months
> Thus the treatment had provided them a median life extension of about 3/4 years. The lucky ones probably have got more than an extra year.
The 'median' patient in this trial lived ~6.6m longer if they received daraxonrasib. It's worth noting that the performance of the chemotherapy arms was stronger in this trial than previous trials of second-line chemotherapy; whether this reflects better care or a prognostically-superior trial population remains to be seen.