We are at a major transition point here. I have 3 lawns in a row that all have a mixture of Bermuda, Zoysia, Centipede and St. Augustine in each. I deal with more St. Augustine than Centipede but still 90% of my lawns are Bermuda. 65 miles south of here 60% of the lawns are Centipede or St. Augustine.
The reason some of these lawns are patchwork quilts of turf types is because people will lose sections of St.Aug/Centipede due to the occasional winter where temps dipped to low. Then we'll have few winters with warm enough temps where it'll bounce back some.
Lucky, I don't think so. At times, I have to really be on my toes about what products are being used and when...on the same lawn.
"The Poor Fish" circa 1930's: The Poor Fish wouldn't have been caught if he'd known enough to keep his fool mouth shut.