It's still not exactly easy, and the API has not changed much since the aughts except than to become richer and more complicated. But almost nobody writes raw C

It's still not exactly easy, and the API has not changed much since the aughts except than to become richer and more complicated. But almost nobody writes raw CUDA anymore. It's abstracted away beneath many layers of libraries, e.g. Flax -> Jax -> lax -> XLA -> CUDA.