I have supplied and fitted more quiet systems than I ever thought we would.
People in the UK use these cars as daily drivers. Dropping kids to school, shopping, long cruising, work etc etc. They just don't want them super loud. This latest setup is very much like factory sports car V8 with 10% more. Perfect for the majority of enthusiasts. You have to remember, it's a complete system with headers and still it remains civilised.
You want loud.... just fit our louder rear exhausts and it's pretty damn loud!
Unless your version of loud is no resonators anywhere like M Heaven in Dubai!