>>1872616I got curious and found some chain wear tests on ZFC too. 105 looks like it's pretty much the same as Ultegra. Mid level chains seem to be the most economical chains, with only small increase in longevity from premium level chains. If I read this correct.
https://zerofrictioncycling.com.au/wp-content/uploads/2018/04/chainlongevitypg1.pdf