I have a string of four ceramic pull chain light fixtures in my unfinished basement on a 20A circuit with 12awg wire. The chain/switch on one stopped working and when I started to removed the fixture to replace it I discovered that the hot is wired to the terminal not with a pigtails but with one continuous wired looped around and then departing the box to feed the other lights. (The neutral is pig tailed.)
See image (note: the red and one white go to a receptacle -- I think we can ignore those for this purpose).
This seemed unusual so I opened the next fixture down the line and both the hot and neutral are wired in this continuous loop way. (I'm assuming the other two lights are too.)
This certainly seems not ideal but is it dangerous/really bad? Or was this accepted practice at one time?
(I'm in the US. House was built in the 60s but not certain if this particular circuit is original or not.)