If you're writing a lot, it's not a risk. You've got something sitting in a folder that you haven't touched in five years. Blow the dust off, polish the edges, and maybe you make a couple bucks.

Lining up those SFWA ducks will be important. At that point, even as a new publication, if they're easy to work with, they'll quickly become a great second or third stop for fresh stories. They won't get first submissions for awhile, because you can't compete with Terraform's (and others') 25c/word rate. But that's okay. Gems fall through the cracks. Loads of great fiction out there looking for a home.