The largest tech companies like Facebook, Apple, Amazon, Netflix, Google, and Microsoft did not widely adopt Agile frameworks like Scrum as many other businesses did in the mid-2000s.
These tech giants already had existing engineering cultures, practices, and organizational structures that achieved Agile's goals without the need for formal implementation.
The Agile Manifesto of 2001 changed software development by promoting values such as individuals and interactions, working software, customer collaboration, and responding to change.
Despite the widespread adoption of Agile methodologies like Scrum and Extreme Programming, these tech companies had processes in place that aligned with Agile principles and delivered results efficiently.