There are some really good points on both sides of the C++ or Python debate on the AC forum. Performance and feature benefits of C++ vs the established Python apps and community with an easier entry point for hobbyist programmers. There is definitely a way to have 64-bit version on AC with Python support, it's just a cumbersome method.
Because this debate only popped up after Stefano looked into 64-bit AC, now that it can be achieved without removing Python leads me to believe it will stay for the time being. If we do see a huge engine overhaul for AC in the future (a v2.0 or something), I can't see Python surviving that though.