The datablock limit has always been in place, due to the way Torque was made. We still have it in place because it is a reasonable limit and it's not really worth the time removing it just so people can run around with a ridiculous amount of add-ons that largely go unused.
That is one of the reasons that Badspot hasn't even attempted to increase the datablock limit.
I believe it has been doubled twice since the alpha. Again, reasonable.