Just here to mention that ROS powered (AFAIK) 11 out of the 12 teams that took part in the Tunnel Circuit of DARPA SubT Challenge. Good job, ROS community! Read the great news and watch the awesome videos at https://twitter.com/hashtag/subtchallenge and https://www.youtube.com/channel/UCOIHBHRbvncMo7Bf0Vx1zEQ.
Was it ROS1 in all 11 cases or some of them used ROS2?
No idea about that… We (CTU-CRAS) use Melodic everywhere…