When you look at lists of the top courses in the US, the top of that list is still old courses that we'll never play (Pine Vally, Cypress, Augusta, Merion, ect.). However, I've noticed a ton of the best modern courses have all been public. See golfweeks's list of top 100 modern courses. https://golfweek.usatoday.com/lists/golfweeks-best-2020-top-200-modern-courses/ . Sand Hills, Friars Head, and Ballyneal are are private, but there are way more public ones than the overall top 100 list.
It seems like Coore & Crenshaw and Tom Doak are always working on a new course at golf reso