[lmm]

The block syntax is comparable to understanding File | null - it's day 1 learning in Rust. The part I'd say you're missing is that Option is just a plain old type and ok_or is just a plain old function, so if you don't know what they're doing you can always just click through to their definitions (which are in normal plain old code) and read them. Even if you don't do that, you know that they're not doing any magical control flow things. Whereas to understand the first example I have to understand what "if" does and how having a bunch of statements after each other works, and there's nothing to tell me that anywhere.