Originally Posted by
Rides4Beer
Riding over 10,000 miles/year and going through a rear shift cable every 3k miles convinced me to go di2, I'll never go back. Absolutely worth it for me. I don't even use synchro shift or any of the other features, I manually shift, and it's perfect, every single time.
You could have replaced your badly engineered Shimano brifters with SRAM ones for a cheaper price and the problem would be solved for a lot less money.
I'm starting to think Shimano intentionally made a faulty design that breaks cables to make people go Di2.