I don't buy cable releases very often. I bought a handful off a fellow member in January at a camera fair, maybe a doze. And one for a Sinar shutter last year which cost me 4½x what I paid for the shutter
Prior to that I last bought cable releases about 18 years ago. around 25 for £10, a job lot at a camera fair.
Variety is useful, some shutters need long er throw releases, for instance my large Gitzo studio shutter. For LF work particularly when making multiple exposures I prefer the light cloth covered cables rather than the heavier plastic covered cable. So I have a selection in my backpack.
Ian