How has pork changed?

It's difficult to answer "how has pork changed?" without more context. Could you be more specific?

Are you interested in:

* Changes in pork production? For example, advancements in breeding, farming practices, and technology have dramatically changed how pork is raised.

* Changes in pork consumption? Consumer preferences and dietary trends have influenced the way pork is consumed and prepared.

* Changes in pork quality? Pork has become leaner and more flavorful due to improvements in breeding and feeding practices.

* Changes in pork regulations? Government regulations and food safety standards have evolved over time, impacting pork production and consumption.

Please provide more details about what kind of change you are interested in, and I'll be happy to give you a more specific answer.