I know this question is off-topic, but here I might get the answer.
Recently I started collaborating in a project based on ROS and I find several examples outdated, some repositories I am interested in have hundred of pull requests but are not merged. The supported Ubuntu versions are old.
My point is, ROS project does not give me confidence as other open-source projects. I hope I am wrong, but that is my impression after going throwout the guides and other documents.
By the way, the guides for beginners are quite detailed and easy to follow, but when one starts digging deeper, finds the lack of activity, like if people migrated, using other alternatives.
Either, the project is not widely adopted, or consumers of this software make their own improvements and keep them private.
If this is the reality, are there other know alternatives?