It has changed. There are users with scripts running to detect any additions that don't fit their model, no matter how uncontroversial. It's become difficult to contribute even on the most boring of topics.
* I say "mostly" because the funny thing about controversial topics is that it's often the contributors (rather than "deleters") that possess the greater amount of persistence in pushing the content they want added and kept. So very politically loaded subjects will suffer from the opposite problem, resulting in sprawling trees of linked articles on a subject, each a huge bulk of prose wrestled through numerous talk page threads of PoV objections.
It's the normal/mundane stuff that gets summarily deleted and forgotten about forever.
Victors rewrite history, and now the article about it too.