some electrician around here about 50 years ago loved using the crimps and friction tape to make joints. only time ive ever seen it that way, theres a ton of houses done by the same guy apparently cause i find his work all over the place.
i hate taking them apart especially the toasted up ones in ceiling boxes.
some of this guys other off the wall trademarks include
2 hole romex straps every 12" literally
metal boxes bonded with a tail of insulated wire usually red or black crimped to bare grounds
bundling cables coming into panel with thousands of wraps of friction tape, also twisting 5 egcs together, wrap whole length in friction tape to make up in panel
j boxes everywhere, usually with no good reason