How true is the statement "History is written by the winners?"

You might be interested in some previous posts on this often repeated maxim:

Veracity of the Maxim

They always say history's written by the winners, but it seems in modern times this isn't always the case. What are some notable exceptions? - 28 comments, over 2 years old.
This thread gives some examples but mostly focuses on proposing a crucial addendum to the saying.
In what ways is the "winners write history" trope true or false? - 129 comments, over 1 year old.
Although the topmost comment chain has been deleted, the top level comments below it contain a wealth of examples and analysis of the issue scattered throughout the entire thread.
History, as the saying goes, is written by the winners. So how did revisionist "lost cause" narratives of slavery and the Civil War ever gain as much traction as they did? - 7 comments, over 1 year old.
This thread discusses modern historiography with regards to the saying and also brings up a relevant passage written by George Orwell.
How true is the phrase "history is written by the victors"? - 2 comments, over 12 months old.
A commenter in this thread gives an extensive book list covering the formal historiographical side of this question.

Alternatives

A famous quote says that history is written by the victors. In your field of study, what is the largest attempt to paper over an event or movement? And how did the powers-that-were try to sequester the information? - 54 comments, over 1 year old.
This once more delves into the "writers writing history" bias, this time bringing up examples from all across history with a focus on ancient topics.
People say "history is written by the winners" and imply it's biased. Was there ever a time when people thought history was biased because it was written by the literate? - 50 comments, over 5 months old.
This thread delves deeply into the bias mentioned by the original poster and also discusses various historians' arguments and methods for recovering "subaltern" histories which may be difficult to pull from most primary sources.
How do Historians get around the "silent evidence" problem or the "Winners write history" problem? - 9 comments, over 9 months old.
This thread delves into how to pull out very basic information that is taken for granted such family structure and social class from texts that do not readily explain these relationships to the reader.