Continuing with the same update - the team has decided to create a new node called PolyCurve.ByThickeningCurveNormal so that the old node (PolyCurve.ByThickeningCurve) continues to work as it did before and not break existing graphs. The new node will be available in Dynamo 2.9 and the old node, although it can be loaded from old graphs, will no longer be usable in new graphs as it will be hidden in the Dynamo library.