Pulling on the cable of the rear derailleur one gets the feel the the return force - particularly for the smaller rear sprockets - is quite weak (weakest part of spring, according to Hook's law). That's were most of shifting troubles are (I know, that status of cables and housings are most important) So does that spring wear/gets weaker over time? (My question pertains in particular to DA7800 rear derailleur)
Thanks for comments, happy holidays!