Swaddling??

Je

So we always swaddled our girl but when she was 3 months we started doing one arm out, then both. She's 4 months now So now we swaddle her but with arms out. It's a velcro swaddle. Is this okay to keep doing or should we switch to a sleep sack or what? She's not rolling over quite yet but she's so close. Can you keep swaddling if you leave the arms out? Thanks!