@William74 Superhost status is awarded to hosts who exhibit certain hosting skills - otherwise it would be called “Superlisting” status. A 5-star listing, like a 5-star hotel or restaurant, is so much more than the real estate.
It certainly sounds difficult to maintain those numbers across 50 listings, but like Superhosts everywhere, all you can do is keep trying to improve. You mention separate properties you manage that are not scoring well. Sounds like those are the ones needing some attention.
Also, I am curious, since you can see 50 properties at a glance: is it true that Superhost status equates with better performance? We have had some discussions here about search results, and have found that in any top 10 are always at least a couple of listings that fall below 4.8.