What happens when your dog dies? You sulk, cry, remember and honor him or her. Then you go get another puppy.
With me personally if I have that ATF and she retires, I probably let her go long ago so I really don't get upset. Just glad that we ran into each other and she came into my life and we enjoyed each other's company.
This is hobby is not about forever so I don't treat it as such. Also what is great about this hobby it teaches you how to let go and move on as there are so many amazing gals out there for you to discover.