From Wikipedia's entry about itself:

Because Wikipedia is an ongoing work to which, in principle, anybody can contribute, it differs from a paper-based reference source in important ways. In particular, older articles tend to be more comprehensive and balanced, while newer articles may still contain significant misinformation, unencyclopedic content, or vandalism. Users need to be aware of this to obtain valid information and avoid misinformation that has been recently added and not yet removed

So Wikipedia is honest about its own limitations even if some others don't regard and use it as they should.

In my own field of work, Wikipedia seems quite accurate and up-to-date (I keep an eye on it and may contribute towards in myself in the future).

RS