Will I be locked out of my site during the switch to Facelift?
Your original site remains up and running until the Facelift is complete. Even after it's done, your original site remains live until you actually publish the new site.
While you can publish changes during the Facelift, we may not be able to include all your changes. However, it's better if you make changes to your original site before the Facelift process starts. That helps us replicate those changes.
You also can make changes after the Facelift is swapped into your account — and before you publish your new site.