Just pretty darn expensive to maintain, insure, and of course purchase.
The CAF I was involved with had one that Chance Vought restored and then they donated it in the early 1980's. Through the years there were a few mishaps that occurred to it. One time it made a landing in New Mexico with the wheels up. Another time it hit a fence. There was also the time that the engine quit immediately after take off. Somehow the pilot managed to turn around and land without crashing. That was a very close one. Each time, the group managed to get it repaired and back in the sky. It's no longer hangared in the area. Sure miss seeing it.