It remains to be seen if this ebbs and flows, or if the nickname is starting to go away after sticking with me for close to half my lifetime.
(For those who don't know, my policy on my nickname is that in social/casual contexts, people can call me either Josh or Desh; I have no preference. But I rarely introduce myself as Desh. My reason for that is mainly to see how the nickname can spread without me helping it along too much.)