Whoah, no. It's about building crypto code at all.
Given a choice between building something with Nacl and a bespoke stream cipher and building something with a bespoke cryptosystem and AES, I would have a hard time picking, but I'd lean towards Nacl.
Given a choice between building something with Nacl and a bespoke stream cipher and building something with a bespoke cryptosystem and AES, I would have a hard time picking, but I'd lean towards Nacl.