[18al]

Derailleurs are hard to debug.

The rear derailleur on my cycle wasn't shifting as expected, and so I spent an afternoon following YouTube and adjusting its limit screw and barrel adjuster to no avail.

Finally gave up and took it to a shop, the mechanic took the cable out of the housing, wiped it down, greased and put it back in; the derailleur starts shifting normally.

[berkes]

You make a good point often overlooked.

"Easy to repair" doesn't necessarily mean you or I can repair it easy. It might mean someone, preferably a local, independent business, can repair it easy.