Yea just the hassle of having to update all the old S+ modules. The main problem is that if you just compile your Simpl as normal you dont even know these S+ errors are happening! So you end up deploying systems with broken or not optimal S+ module behavior when building for 3 series. The compiler should not break any logic under a if_series3 just because you have 4 series checked in S+. It should still be valid for 3 series but it instead breaks it. I have a case open and they have confirmed this broken behavior and filed a bug report.?
