Cow's milk at one year?

I am mom to a 2.5 year old DD and a 10 m old DS. New to the boards but hoping I can find help/support/like minds here. I am thinking forward to DS one year ped appt. My 2.5 year old has never had cow's milk--- she is soy and dairy intolerant-- something we discovered very early on so I never had to consider giving her cow's milk. I know that the mainstream practice is to introduce cow's milk at a year. As DS is happily nursing there is really no reason for me to consider introducing cow's milk for him, is there? Is there a benefit aside from convenience? (not a factor for us) Is it in anyway shortchanging him? My plan for nursing him is to continue with child led but I'd be lying if I said I wanted that day to be anytime in the near future...so anything I can do to keep him nursing as much as possible is ideal.

Thanks for any input.