Simply put, there's no reason to use gear whose safety is in question, given that there are a number of solid design & production companies out there. I have a yellow and green 01' aliens on my rack, both fallen on and both tested to 75%. I've retired the other aliens for sole use on my big-wall rack, as they were later additions and have passed some basic tests to around 25%.
Metolius UL TCU's and BD C3's fill out the small cams section of my rack. They are both lighter, more durable, and properly tested. If you compare the designs of C3's, Metolius Ultra Lights, and Aliens... the Aliens simply don't stack up anymore. When introduced, they were innovative. At this point, their design has been surpassed.
My rack has changed over the last 15 years. Started with Ovals on Perlon and Nylon, now have Heliums on Spectra and Dyneema. Times change, we need to change with them.
Trad is the only way to fly.