Knowing that almost everyone has a smartphone right now and a internet connection, i don't think it would be hard for dev to post once in a while not some news or anything but a simple hi would do it, i don't think that is hard even if you are 24/7 on real job work, and no one is working that much
+1
While it is totally acceptable to have other commitments besides your coin and emergencies may arrise. The ease of simply getting online to say "hey guys" or "such and such happened but I'm still here" makes it so that hearing from the dev every few days is nothing that is too much to ask. Silence will kill your coin, bottom line. A simple "hi, still here, working on the stuff" every day or two will keep people having some faith in the coin.