How to ween from swaddling?

Caitlin

My little one is 4 months now and not rolling yet. But as soon as she does, SIDs guides tell you to get rid of the swaddle.

My baby loves her swaddle. And sometimes she’s fussy until I pin down her arms for her. If she’s in a good mood she’ll sleep without it.

How do we ween her out of the swaddle totally? Do we have to or are we just supposed to keep the arms out once she starts rolling?