Most commercial jet engines today are High Bypass variety where 80% or so of the thrust comes from the fan, and not the jet portion of the engine. The UHB was just the next logical progression. Get rid of the fan shroud which is restrictive and is installed only to control noise. But that was the big hang up, however. They are much louder than conventional turbofans, and could not meet the rather strict, in many cases, airport noise ordinances in most communities.
So we continue to pollute more so people who buy houses around airports and still hear the crickets chirp.
Ain't government wonderful?
I understand the sentiment. I know of one airport in the middle of a suburb where 100% of the homes surrounding it were built years after the airport was established.
OTOH, less noise is always good. Maybe Boeing should talk to the Navy to see how they get their screws so quiet. Water, air, it's all just fluid dynamics.
The loudest plane on earth is the Tu-95. In some ways, ahead of its time.