Wow, I just found there is 50 Entity limit for add-ons. Uh, now what, I have nowhere to go. I have a huge object graph, am adding some great new config and now cannot do that because of this limitation.
I can understand not wanting to allow runaway schema creation but this is a bit of a blocker.
Failing that, I will have to start collapsing all those nice tables into XML, serializing them, such overhead! just like the bad old Bandana days ;(