Simple answer. France wants Ariane 6. Therefore, France will kill that type of solution because it does not protect the industrial capability in solids. And for France solids are strategic due to the nuclear missiles.
MT Aerospace of Augsburg, Germany, proposed an alternative approach for a next generation European launcher system.The annexed presentation was shown during the 1st Space Access Conference in Paris end of September 2011.The concept, based on the common core booster architecture, is strictly driven by recurring cost minimization.What do you think?Spacediver
What you are describing is what the French Industry wants.I am talking about the French political authorities.
Wow, putting the attach points on the modular interstage adapter panels is a really cool concept. Has that been done or proposed for other vehicles?