Is this just a temporary test, or is the plan to use simple mode here on Meta permanently?
While I can understand why it doesn’t matter at all who the author is in the official documentation - which is why the author of all topics was changed to Discourse almost two years ago - I think this information is quite relevant in the Wiki.
The wiki is already at a disadvantage compared to the documentation category. It doesn’t have higher priority in search results, there is still no easy way to search within 2 categories and the idea of incorporating topics from there into the official documentation does not seem to have led to much follow-up, even for the topics that were identified as missing areas back then.
Precisely because the wiki already receives less visibility and attention, visible authorship and contributor recognition feel more important there, not less.