wouldn't that require breaking the ABI? Many enterprise wont be happy if they do so. Also, there is not way to prevent using old cuda compilers.
Example: Where is Newtonsoft's Physics Library v1.x? It was awesome, easy, fast, and worked with my engine (or rather, my engine worked with it?). Gone. Nowhere to be found, not even on the internet archives way-back-machine.
It's rather trivial for a juggernaut like NVidia to wipe the earth of older cuda compilers by tweaking a driver and making cuda compilation cloud-based.