The following one year was tough, initially I was carried around in wheel chair, too much muscle loss by time of diagnosis. At first, my body was so weak that doctors decided I can't even take the first cycle of chemo at once. My arms were so bruised with all the poking that I had to move them carefully. Then chemo side effects started getting overwhelming. But slowly, things started working. One year in I was back on my feet, started working again. Two years in, here I am writing this comment and hoping for a healthy bright future for everyone out there.
It's better to get advice of multiple doctors, understand risk vs rewards. Yes, there maybe a point when its time to optimize for quality of life and give up, but that should be after one or two lines of treatments.