Its probably because it was free for most of its life and the dev doesn't do it for a living. Only as a hobby. If updates were more consistent on a set schedule it would make sense. but now its a few days from a year without updates and their charging for a most likely dead project they will never finish. (This is not supposed to be bashing or whatever its called now. I'm told im bad at phrasing things and it always sounds like I'm angry so apologies if that's the case here)