Hi @Molly5
I was 65 when diagnosed (71 now) and wouldn't be dead for quids. I was lucky & didn't need chemo ...
It can be a tough ask to do the chemo treatment ... but with the help of your Chemo Nurses, they should be able to help abate most side effects.
I found that the radiation was fairly 'easy' (just let the nurses know if you see any skin breakdown & keep the lotions & potions up to it after each session ...)
The hormone blockers don't affect everyone badly - so you can always just give them a 'go' and if they don't suit, then in discussion with your Onc, consider a break!
But it is the mix of the treatment that is most likely to give us many more years of life, which hopefully, will be long & prosperous!! ;)
I think your general health and agility and support network (other than the current cancer treatment) is a factor in this as well .... and maybe if I was already in my 80s, I would think twice re aggressive treatment .... time will tell.
take care