That's a good thing.
But, it can also be a bad thing. Here's an example:
I finished off my openwork beanie design, above, with a final round of slipstitch. (So pretty!) After the pattern was published, a crocheter noted that the slip stitch round made her hat way too small. (So not functional!)
Since receiving that helpful feedback, I've been using single crochet or one of its variations -- such as back loop single crochet and reverse single crochet -- in my beanies' final round. (So much stretchier!)
NOTE: This is the first of my "Hundreds of Hats Later: What I've Learned" blog posts. Next up: "When Being Wrong Is So Right."