As long as they are functional, I will keep them. I'm currently using my older DSLR as my second/backup camera. When I carry two, I will use my f4 zoom (100-300) lens on the newer camera because it has a more usable ISO range and my f2.8's (70-200 or 28-70) on the older one. The DW also has her DSLR and her film SLR.