In the ideal case it should be constant and as close to zero as possible! Of course we don't live in that world for arbitrary scale, but surely "a one person SaaS" should be able to do without so much low-level tech and infrastructure work.

It seems to me that even when you outsource your infrastructure to a major cloud provider, you're still spending a lot of time yourself setting everything up.

I'm certainly not criticising Anthony here – what he's done, especially in terms of product development, is remarkable – but just thinking about the industry at large.