Because we were able to backdate content into the database we were able to be more liberal with the imported question and not disrupt the experience on Robotics Stack exchange so we actually opened it up to any question which had an upvote or any question with an upvoted or accepted answer. Thus migrating basically any content that had been recorded as valuable to more than one person.
This heuristic resulted in 34,114 questions from ROS Answers and 2,004 questions from Gazebo Answers being migrated to Robotics Stack Exchange, which was just less than half of the 69,832 questions available on answers.ros.org, and 7,233 on Gazebo Answers.
This migrated 39,953 and 2186 answers from each site respectively. Of these 33,821 and 1976 questions had accepted answers. Which means that 99.1% and 98.6% respectively of the migrated questions had accepted answers. This is setting a very good standard for the new site in terms of expecting to be able to find answers to questions.
A fun stat most questions had one answer, but some had as many as 10 here they are ordered by frequency.
1: 31130
2: 4156
3: 644
4: 124
5: 33
0: 19
7: 5
6: 4
10: 2
8: 2
9: 1
For the user accounts we had 187 people submit user associations. A handful were invalid (such as only providing one of the accounts or linking to non-extant profiles) And some had obvious typos that were able to be manually corrected so there were 183 accounts which had associations which could be credited.
We will be maintaining the old sites as in their read-only state. And are working on longer term archives as well as redirects for content which has been migrated. Gazebo Answers has been having stability and performance problems so we hope to switch to the archive asap to make it more accessible.