I feed and care for stray dogs and cats as much as possible. This morning, a new stray showed up in front of my place. He's old, his eyes are red, and he's clearly sick. I've seen him a couple of blocks away with another group of dogs. I think as he got older, his group rejected him. Interestingly, my group accepted him, and I hope it remains that way. I plan to feed him and take care of him.
No matter how useful or important you are, at the end of the day, when you get old, you're often no longer needed. It's the cycle of life!