Isn't it currently around 74? There was a thread a couple weeks back about using player housing as guild halls, and the problems with the number of sets/attunable stations, but I couldn't find it offhand.
The other thread was likely under housing, as it was discussing how close we were getting to the 350 slot limit without ESO+.
71 is the current count, going to 74 with Firesong. 74x4=296 which is more slots than a lot of houses have unfurnished, as trees rocks etc. are included in the limit, and you also need lighting, mundus stones, consumables stations, dummies, …