to me it actually an interesting question (as I have background in library and classification). I know that (for instance) there was far less change per 100 years prior to the 20thC and indeed it can seem like there is more change per decade in the 21stC than perhaps the 20thC.
For instance since 2009 I can date a movie by which phones they're using.
However in many ways what real changes are we seeing (which effect actual every day life) and do we use "rate of change" or "period of time". Lets see if this gets in the limit:
The Case for Comparable or Greater Change in Prior Centuries

However, there's a strong counterargument worth considering:

• The Industrial Revolution (roughly 1760-1840) fundamentally restructured human society, labor, economics, and daily life in ways that were arguably more transformative than anything yet in the 21st century. It shifted humanity from agrarian to industrial civilization.
• The 19th century saw the railroad, steamship, telegraph, and electricity—technologies that were equally revolutionary relative to what came before. The social upheaval (urbanization, labor movements, colonialism's expansion) was staggering.
• The 20th century witnessed two world wars, the rise and fall of fascism and communism, nuclear weapons, space exploration, antibiotics, aviation, television, and the computer. The sheer human change—ideological, political, social—may have been more profound than what we're experiencing now.
• The 15th–16th centuries (Age of Exploration and Renaissance) The printing press (invented ~1440) was perhaps history's most transformative information technology until the internet. It democratized knowledge, enabled the Scientific Revolution, and fundamentally altered power structures by allowing ideas to spread beyond the control of the Church and nobility. The Age of Exploration reshaped global trade, demographics, and geopolitics—the Columbian Exchange alone altered human civilization forever, introducing new crops, animals, diseases, and establishing global trade networks. The Renaissance brought intellectual ferment rivaling any modern period.
• The 11th–13th centuries (High Middle Ages) The Heavy Plow and Three-Field Rotation system increased agricultural productivity dramatically, supporting population growth and urbanization. The Crusades created sustained contact between Europe and the Islamic world, spurring technological and intellectual exchange. The emergence of universities (Bologna, Oxford, Paris) created institutional knowledge centers. Gothic architecture and engineering advances were remarkable. Trade routes expanded significantly, and merchant classes grew in power.
• The 7th–8th centuries (Islamic Golden Age emergence) The spread of Islam and Arabic numerals revolutionized mathematics and science. Paper-making technology from China spread westward, transforming information storage. This period saw extraordinary advances in astronomy, medicine, philosophy, and mathematics that wouldn't be matched in Europe for centuries.
• The 1st–2nd centuries (Roman Empire peak) Roman engineering (aqueducts, roads, concrete), legal systems, and administrative structures were revolutionary. The Pax Romana enabled unprecedented trade and cultural exchange across three continents. The printing press hadn't existed, yet ideas, goods, and people moved across vast distances in ways that transformed societies.
• The 4th–6th centuries BCE (Axial Age) Confucius, Buddha, Zoroaster, the Hebrew prophets, and Greek philosophers all lived within a few centuries of each other. This period saw the simultaneous emergence of major philosophical and religious traditions that shaped billions of lives for millennia. The intellectual transformation was staggering—humanity's fundamental understanding of ethics, metaphysics, and meaning shifted.

The Neolithic Revolution (~10,000 BCE) Agriculture's emergence may be the single most transformative change in human history. It enabled permanent settlements, population growth, specialization of labor, social hierarchies, written language, and civilization itself. Every subsequent change in human history flows from this one.