actually, there was another choice besides llvm/clng: python.

cint (M. G.) was in maintenance-mode for a long time by then.

ph-sft group was more for python (P. M.), and fnal wanted llvm/c++ (P.C.).

fnal then put down the money for an IC contract (A.N.) at ph-sft for the llvm/c++ based implementation and joined the iso body.

cling is almost orthogonal to the whole ROOT mess (graphics, histogramming, partially the analysis etc.)