Here's my take...
OK guys,
Here's my take on this.
My dad was a fighterpilot & instructor in the RAF. Cars I remember from my past are, Frog-eye sprite, Daimler Dart, TR4, TR4a, TR6, GT6, various spitfires, etc etc.
I grew up around machinery, both modern & old.
I never saw my father "abuse" a machine, that is to say use it outside it's limits or use it uncessarily. eg if it is barely raining he'd NOT turn the wipers on permanently, he'd just turn them on for a single wipe, when the screen was caovered in rain spots. ( this was long before the age of intermitant wipers or rain detection systems)
I am the same with my watches. I use my Chrono when I need it. I don't have it running uneccessarily. That's not say that I don't, now & then, run it for a few minutes ( just to watch it, time spaghetti or whatever).
I don't see the point in running a machine ( & that is all a watch is ) without having a reason. IF you run it permanently it will certainly have some wear on the various moving components. This wear may not be noticeable for years, but there WILL be wear & tear.
I don't see the point in creating this wear & tear without reason.
Other people ( or another point of view ) will say that leaving something stationary for long periods is not good. Oils will disperse or harden. This too is a valid point. I do run my chrono's occasionally. I also assume that the watches have been designed & tested to withstand this.
So that's my opinion on this. Obviously other people will have differing opinions.
Steve