I like that I can add parts like wheel, chain etc. to my bike an get the kilometers I used them.
As winter is coming I'll use my bike on a wheel on trainer (Tacix). Therefore I change the rear tire to a special one and the front tire for sure will not get any kilometers on. In spring/summer I'll put back the current rear tire and keep going with the front tire.
So therefore it would be nice to stop/pause the usage of parts and then just activate it again. So the used kilometers on this part are still correct.