What do you mean? Or are you being sarcastic.

Perhaps I misunderstood your comment, but I thought you meant to say that you keep 10 saves and overwrite the first one each time you exceed the tenth. Why not simply keep making new saves?
You have 1,500 saves for only 4 characters?! MAH GAWD... Here I thought I was cautious about my save files at 2 for all 19 of my characters... You, sir, win some kind of epic cookie, FOREVER!!!
I think it's a habit carried over from some game where my quicksave file got corrupted, so I make hard saves all the time instead of quicksaves.
Also helps in case there is any problem with a mod, so I can go back to a certain point before I installed the mod, etc.