What is the most common multiplexer?

Could you please elaborate on what the most commonly used multiplexer is in the realm of electronics and digital systems? I'm curious to know which type of multiplexer stands out as the most prevalent in applications, be it for data transmission, signal routing, or any other purpose. Is it the 2-to-1 multiplexer due to its simplicity, or perhaps a higher-order multiplexer that offers more flexibility and capacity? I'm interested in hearing your thoughts on this topic.