It's a designation. I wouldn't think I would need it either (never leaving this lab or that lab) THEN IT HAPPENS...a little thing called life. Every lab I applied for with CDT behind my name got me interview seat across from the owner. CDT to Docs don't mean much, but the higher end clients know...especially the Prosthodontists. If you want to do 'mac and cheese' work for your entire career that's fine, nothing wrong with that but as you achieve better skills usually means you charge more and comes with it better clients. You will do what you want, I'm not going to sway your mind, but I have junior techs that look up to me and having CDT and going for a CDT designation means something to them...therefore I'll stand behind it. I dismissed the NADL years ago and for my sanity don't associate with them when it comes to the CDT, besides NBC is who you deal with mostly anyways. Keep your CDT, if not for yourself for those junior techs and those surprise life changes.