Looks like Valetta could become the most liked best girl, that turns into worst girl in a manga of the last few years.
On Wikipedia: There have been some articles on laws of physics, that have been on the spot, very easy to understand and have been quite complete, but somehow got "improved" over the course of 10 years by becoming nauseatingly filled with complex mathematical formulas and the intuitive texts have been improved with unnecessary highend scientific vocabulary. Some very good passages have been even removed, because some other "fine" texts in other "related" articles take care of the matter. Using wikipedia in the 2000-2005 to look something up yielded quite a bit of knowledge in short time, especially when the matter has been presented overly complex in the books. It was easier to understand and a wonderful source/starting point to decrypt other sources. But I have the feeling, that since the 2005-2015 that easiness is gone from many articles and wikipedia as an learning platform for scientific has suffered. Sure, they might be now mostly complete, but also too complex. If I need a complex version of something, chances are I need it for professional reasons and in this case I look it up from verified sources, instead of an platform, that may still contain errors.
Just a little rant, but maybe I just got unlucky with a few articles, I needed, and wikipedia is still as fine, as it used to be..