Historically a lot of these older links had problems with conditioning, particualrly before irrigation, all down to the weather and the amount of play they received. Thats why places like St Andrews, Carnoustie and Troon have more than one course. The second course, originally called the relief course, was built to ease the burden on the Championship course allowing it to be closed to recover from excessive play.
Thats also why they played the Old Course, Carnoustie, North Berwick etc the opposite way, so as to spread wear and tear. Even after the New course at St Andrews was built, the Old Course would sometimes be shut at months on end to rest it. I've also read that on occasion they instigated a composite course between the Old and New, again to spread play.
In todays economic climate with fewer rounds, I would think that there would be less need to rest a course on maintenance grounds. Also with every day the course isn't in play representing revenue lost, I can't imagine that many clubs are going to go down this route.
Niall