In C# there have been changes to ruins that have been logged and put into the changelog but we do not have a post that fully details ruins themselves and any and all changes, such as are advanced weapons gone, how dead civilisations work, the chances for each type of a ruin to appear when a world has generated a ruin and more.
This is a great deal of confusion so I am making this post on behalf of myself and others to ask steve to write a post detailing what the mechanics for ruins are specifically so it is easier to then disperse this information to the wider populace, it would be a great help if you could do this steve thank you!