I know what you mean. My early cars made in the 1960s had really nice, high quality sounding twin horns even though they were cheap (for the day) when new. During the 70s, they started fitting really cheap and nasty sounding horns even on some quite upmarket cars, and I didn't like it even then.
On a slightly different tack, my dealer lent me an Aygo a couple of weeks ago while my car had it's 20k service and had the winter tyres put on, and it had the unbelievably cheap, nasty, tinny sounding clicker for the indicators that I'd heard on some other Toyotas. Even for the few hours I drove the car (which was nice in every other way, even had reversing camera, hill start assist etc. and was brand new, just 8 miles on the clock) it irritated me beyond belief. If the Gen 4 Prius had such a horrible clicker, it would have stopped my buying it, unless some way of changing could be found.