That is patently ridiculous. Even if it were true, the chain is a wear part that requires periodic cleaning, lubrication and yes, replacement. Shifting wears the chain faster than not shifting. Does he suggest you replace your current multi-gear drive train with a single speed to make the chain last longer? Riding the bike would "ruin the chain" faster that not riding it. Would he suggest you not ride your bike to preserve the precious chain? Absurd.
Thank you and @Dallant for your feedback. I though it was BS.
FYI, EMTB was created to enable mountain bike riders, who ride in rapidly changing conditions, to not have to pay attention to shifting assist levels while also paying attention to correct gear selection. I had it changed over to EMTB and then back to Sport. I prefer the four defined assistance ranges rather than having one that spanned several ranges. I would rather have greater control over my discharge of electrons and find I used less battery that way. Plus I ride mostly roads or gentler trails.
FWIW, my experience has been the same battery use and less shifting and less changing of assist modes. I mostly ride roads and gentler trails also.
