User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-39544151-20200526181836/@comment-24006128-20200526183246

1. Our aim is to preserve content in good standing. If such content doesn't make the jump, we'll work with your community to fix it.

2. The read-only time will vary based on wiki size. Some will take minutes, others will take longer.

3. We'll be looking at customizations during the migration and will be there to help if something goes wrong.