I will admit that I am not a fan of duct work.
The ducts are a pain to maintain. The ducts get dirty quite frequently. If you do any project, it is a good idea to muck out the ducts. You need to hire professional ductwork cleaning rather than do it yourself. You can easily clean the inside with a scrub brush, but then it is very simple to pop a seam or cause a crack. A small hole can create a big disaster. Losing air to a small crack means higher energy bills and possible HVAC repairs. Ductwork sealing is then required. You need to have air with sealant particles to fix up the holes. Another reason I don’t like ductwork is that I don’t feel it is very efficient. Having the whole home be one temperature just doesn’t seem smart. Why would I want a single temperature throughout? It makes sense that if you live with multiple people, you would all have your own temperature needs. Also, when cooking in the summer you might want AC but the people in the living room may not. If you have rooms that aren’t in use, why bother providing them with HVAC? Zone control makes sense on so many levels. You just can’t do that with a ducted system. Also, even when the ducts are properly sealed and tight there is still air loss. It isn’t as energy efficient as a mini split. That is why when the time comes and I need to update my HVAC equipment, I will choose to go ductless.