I read so many posts here and on other firums of string loops fraying or getting worn out from release jaws. I have tried a loop, but just didn't care for one as I have yet to find a release that suits me plus the idea of having a loop spinning around the string and just other issues. I have used a rope release since the mid 70's so am just used to it.
My present release is a Cascade model 8 that has been in use for nearly 10 years and guess what. The rope was showing some signs of wear and I finally changed it yesterday. 10 years on the same rope. During that time I've hardly ever had to replace serving due to wear.
Some day somebody will make a release I would like to try and a loop may be in the future, but as many say, "If it ain't broke then why try to fix it".