I have a Guest Book, and most of my guests leave long, personal stories about their stay, which all guests love to read during their stay. Only about 30% leave an official Airbnb review, and many undoutedly feel that what 'needs' to be said they already did in the Guest Book. In 350 guest stays over 3.5 years I have only received 120 reviews all told, so this has been the pattern from Day #1. I have ~never~ had a guest that has not been happy with their stay (350/350) and never had a bad review (0/350).
So Airbnb's new 'At-least-50% Trips Reviewed' requirement, to stay being Superhost in the future, works against my particular case; so be it. There is little to be gained for me to get them to say what would be the same thing for the upteenth time. The Guest Book on the other hand, appears to have more value, they practically all do leave 'their story' in it; we are on our 4th yearly book.
I am staying booked way ahead (2 years) probably because what 50% do have to say in their Airbnb review (~3 out of 6 guests a month, 4-day minimum stay) appears to more than suffice, and really my constant 'new and coming attractions' which I always make sure to show (via photos) or mention, seems to excite them the most.
So no Superhost for me in the future; I am kind of beginning to like the feel of it, because it makes me feel somewhat like a bit of a 'radical', which I always been anyway. 🙂