Originally Posted by plonz

I rode carbon fiber from about 2010 to 2017 and upgraded frames 3 times in an effort to stay fast and relevant in the group I rode with. I used DA 7800 on all 3 and with each upgrade the advances in carbon fiber over that period were noticeable. Less flex, more power transfer yet more forgiving ride quality. As I grew older and became less concerned with being in the front of the pack, I said goodbye to carbon and made the wholesale change to vintage steel. Have loved the experience ever since.

So in my experience, the only need to get a newer carbon fiber bike is if you remain on a quest to beat the rest. In that case, I’d be springing for disc brakes and Di2 as well.