How many of you use them? In what situations?
I see no need for them in traditional stick-framed roof with collar ties or ceiling joists, as the pairs in opposition mean they pretty much stay put without much help at all. Would you do without them on a shed roof? On a structural ridge? Are they required by code? For every situation?
I’ve been using them on most things for the past few years, but they are getting so expensive it bugs me.