Technology is constantly changing. As you can see with your electronics like phones, tablets, and computers, new options are constantly becoming available, and old ones are phased out. This is true of HVAC technology as well.
New advances in what’s possible make it so that older systems fall out of favor. In order to reduce environmental impacts, potentially harmful or less efficient HVAC technology or components are sometimes phased out of production. There are new EPA regulations coming soon that will limit the availability of certain AC refrigerants. How will this affect you? Here’s the info you need.