In the recent release we haven't tackled this yet, although the issue is definitely still on our radar.
Therefore in the recent release there is still a limit on the number of predictors that can be added to an Adaptive Model rule. Depending on the length of the predictor names, it could be between 700 and 800. The observed error upon saving the rule then indicates: 'The code for the static initializer is exceeding the 65535 byte limit'.
We will keep you up to date on the progress on this,