Most of the folks I know who still ride old bikes, regularly or exclusively, ignore comments that we crash more often = distracted (because of DT shifting issues). .

In the real world, crashes occur for many reasons - DT malfeasance does not even make the list. Cyclists on old road bikes most often have far more experience - we were riding with traffic before bike lanes were invented in USA. And survived. All the break downs and crashes I hear/read of lately occur most frequently on bicycles with far greater technologically advanced equipment than DT friction shifters and rim brakes on wheels with glued-on tires (how ancient? is glue technology). Probably distracted by focusing on power, speed, cadence, HR, distance, location, battery status displays, texts, etc. Or maybe they never learned to hold a straight line with one hand on the bars, or when reaching for a water bottle. .

Clear your handlebars and your mind will follow.

No crashes. Rubber side down.