As to the turning colors or shades of colors when wet, I find that floss does that as well, as long as you don't seal it with something (which I often do seal it with Sally Hansen HAN). I've also used the standard Poly sewing threads, sealed or unsealed. I think the difference is the advertise translucence of silk, where the other threads more mute out and or darken in color. In the end, for me, it's a matter of fit and function. If what I use catches fish, I'm good with it ! I might get a spool of silk one day just to see what the fuss is all about but 30 years so far I've done without it ( unless some of my old floss is indeed silk and it could very well be).