Logically, since we need a "good reason" to licence firearms here and your good reason is no longer valid, ie you got a shotgun to go hunting but you never go hunting, then that would be cause to not renew the licence.

I've not heard of someone's licence being revoked through lack of use, though I have heard of people being asked to provide their range attendance for target shooting guns to prove they are actually using them as intended.

I do know one guy who needed surgery for a condition which left him unable to use his firearm for about a year, and between that, pain beforehand making shooting unenjoyable and physio afterwards working back up to using his firearm his renewal came up.

Questions were asked about his lack of usage and he explained and was, somewhat understandingly, told that his reasons were valid and his renewal would be granted, which it then was.

Not saying this would be everyone's experience or even the average experience but credit where it is due AGS in his district were decent about it.