No one likes that first 4 star rating. It stabs a little in the heart when you do everything you can to give guests the most wonderful experience. So.......just like a prison sentence, once it's over it should be forgotten, or Transport giving us back our demerit points on our licence after three years, please, Airbnb allow hosts to regain that five star status. Perhaps, say after another twenty bookings or two years if there are no other lesser stars given than five.
I'm sure there are many hosts out there like me and others I know who are given four stars because the guest is critical of something really very minor. My friend lost hers for 'stale pepper' after 275 five star reviews.
I think it would be an incentive too, for hosts to try to regain their five stat status and work a little harder. I'm sure that is what Airbnb want. Right?