Before everyone jumps on the paspalum bangwagon, let me point out a few things...
For the courses in the southwest that overseed, paspalum is not a good grass to seed into. It does not transition well and is also very dense, thus making seed to soil contact difficult. In the desert climates, if it's cold enough for bermuda to go dormant, so will paspalum. Example-Dove Mountain-the light tan, dormant bermudagrass ringsaround the bunkers.
Paspalum needs fresh water to be grown in. Once established, brackish water is fine. A clean water source must still be used.
Palpalum gets a lot more patch diseases, similar to zoysia. I, personally have not delt with any patch disease on bermuda, but those that have seen a little disease, just say bermuda will grow out of it.
Because paspalum is a thicker, waxier grass, mower reels needto be checked and SPOT on every time they leave the shop. If not, the leave blade with tear, creating a terrible look, cosmetically, but also open that leaf blade for disease pressure.
Lastly, if the site contain bermudagrass before, keeping the bermudagrass from not showing up again is a daily/weekly/month task of scouting.
Do not get me wrong, I think that we are only going to see more and more paspalum courses because of water restrictions, but not because it's easy to maintain or manage.