Wikipedia has a range of protective mechanisms that admins can apply to high-traffic or frequently vandalized articles: https://en.wikipedia.org/wiki/Wikipedia:Protection_policy

"Protection restricts the modification of pages to specific groups of users. Pages are protected when there is disruption that cannot be prevented through other means, such as blocks. Wikipedia is built on the principle that anyone can edit, and therefore aims to have as many pages open for public editing as possible so that anyone can add material and correct issues. This policy states in detail the protection types and procedures for page protection and unprotection, and when each protection should and should not be applied."

These mechanisms do include a "Pending changes" mode: https://en.wikipedia.org/wiki/Wikipedia:Pending_changes