At last known number, I have 6 in active use, none are new or replacements — nor any purchased within at least the last 20 years!
Two are Gepe stainless braided disc-lock (30cm); two are vintage Pentax red/brown cloth-braided disc-locks, one 30cm Linhof long-throw plunger T-lock and a spare Pentax 20cm cloth-woven release that is kept in the car (never had to use it!)
During the COVID lockdowns (remember them? Now a very distant 5 years back!), I pondered how to free up my hands when I was juggling cable releases and cameras, keeping in mind Rule 1‡. From that, I constructed a small clip, attached to my lightmeter lanyard, where a cable release (or two) is dropped into, essentially just hanging there, which frees me up to wrangle another camera etc.
Still using a Canon electronic remote — a quaint throwback to when remote cords were simple and uncomplicated — bought new with an EOS 1N + PDBE1 back in 1994.
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‡ No. 1
Nothing, not least of all cable releases, filters, film, or whatnot
(and certainly not cameras!), should ever be put down on the ground.