Perhaps look at it from another perspective. Do a bit of research to see if there is a dropout available for your bike with a 1.5 thread pitch. I purchased a frame with a 1.0 pitch and was able to find a drop out that fit my bike with a 1.5 pitch.
The reason I like 1.5 and 1.75 pitch better is that they are less sensitive to dirt dust and debris clogging up the threads.