Comment It's all about the payload (Score 1) 188
Ariane 5 is and continues to be a success but the premise on which Ariane 5 was built -- heavy payloads -- is a small and shrinking market segment. Ariane 5 can launch two payloads, but matching payloads -- the right orbital configuration and mass constraints -- is not easy.
Arianespace hedged their bets by bringing this Soyuz launchers over to CSG with a new (ESA-funded) launchpad at Sinnamari. The much smaller Vega rocket is way off in the distance. The reasoning for Ariane 6 (not having to pay the Russians, as far as I can work out) is sound enough, but the politics (money for France for A6 vs money for Germany for revised A5) is getting in the way.