Originally Posted by PoorInRichfield

Back in the 1980s when my bicycles had non-indexed downtube shifters, it was quite possible to over-shift the high gear and potentially push the chain into the spokes if the derailleurs high limit screw wasn't set quite right. However, it's now nearly 2025 and I can't remember the last time any bicycle I've owned over the past few decades has had an issue that a dork disc might help prevent. If the rear derailleurs high limit screw is set correctly, the odds of having a chain / spoke issue is nearly non-existent. So why do dork discs still exist?