Growing out a grey beard is much easier than a black one and is never traumatic. I can echo what Patrick wrote. These are wise words.
I have 44+ years of continued beardedness. I kept it short, like yours, during a few years but I didn't like the prickly feeling. It's really worth growing it out now. People will comment that the beard gets longer, but I never got negative comments of any acquaintance. Show that the longer beard is your choice and you don't let things go at that.
Your new length looks excellent especially the moustache. Keep it growing.