Murder, she wrote, and wrote, and wrote

I talked about the endless repeatability of CSI and its offshoots. Just by chance I've now seen this astonishing statistic: there were 264 episodes of Murder, She Wrote and 178 of Diagnosis Murder. Those are both amazing figures, but then I found that there have been (to date) 221 episodes of (vanilla) CSI, 181 of CSI: Miami, and 131 of CSI: NY, not to mention 156 of NCIS. Does anyone else find this quite depressing?