In my experience, reasoning about (or maybe being able to manage) memory consumption is more of an issue for fully lazy languages. Having worked on a code-base

In my experience, reasoning about (or maybe being able to manage) memory consumption is more of an issue for fully lazy languages. Having worked on a code-base written in a lazy (Haskel-like) FPL where the architecture relied heavily on laziness, the least pleasant issue to deal with was sudden and obscure explosions in memory consumption. Which would of course have a big impact on performance so maybe this was your point also.