Of course chacha1-7 is a thing. Just not for cryptography. I used 4 rounds of salsa to create random-looking numbers just for fun (4 rounds is what you need to

Of course chacha1-7 is a thing. Just not for cryptography. I used 4 rounds of salsa to create random-looking numbers just for fun (4 rounds is what you need to get good diffusion), and I know for a fact that I am not alone in having the idea. The reason nobody uses it like that is that it is slower than most other PRNGs