It was expensive when it was first introduced, and most people couldn't afford it.
Initially, there were very few 4K movies, TV shows, and streaming services offering 4K content. Consumers were hesitant to invest in 4K TVs without a significant amount of content to enjoy on them.
Streaming 4K content requires a lot of bandwidth, and many people didn't have internet connections that were fast enough to handle it.
Many people even didn't know what 4K was or why it was better than 1080p. It took time for manufacturers and retailers to educate the public about the advantages of 4K resolution.
Many older devices and cables were not compatible with 4K technology, which made it difficult for people to upgrade to 4K.
When 4K technology was first introduced, it was only available on high-end TVs. It took some time for manufacturers to start producing more affordable 4K TVs.
4K video files are much larger than 1080p video files, which made it difficult for people to store and stream 4K content.
Many consumers were satisfied with their 1080p TVs and didn't see the need to upgrade to 4K.