Hm, I think there might be a few factors at play here. First of all, the piece of string just seems to work more than good enough. Why bother with something tha

Hm, I think there might be a few factors at play here. First of all, the piece of string just seems to work more than good enough. Why bother with something that'd add manufacturing and design cost, be harder to repair and is less adjustable to the pilots/clubs needs(/opinions), when what we're currently doing is fine and costs literal cents? Also, I'm not sure that it'd be even possible to do that much better. You need something light, flexible and visible. Almost sounds like the definition of a red piece of string. And then you need to attach it somewhere useful (where you can see it, ideally without looking at your instruments etc), which in most cases would be the canopy. And then you need to somehow affix it. The piece of tape holds well enough during flight, and anything more permanent could be annoying during maintenance etc or might attack the material of the canopy. Changing up the design might also be annoying at the least, since you'd have to relearn a bit. In the end, there's just not much wrong with the string. I works, it works well, and changing it is just not worth it.