Crankcase gasket failure and av mounts were a crap load, gee even took two service bulletins to address the crankcase gaskets. I have done over 20 crankcase gasket replacements, and just one carb replacement.
You think there were fewer incidences of other failures, however they were much greater and more detrimental than some carb issues.
The EL44 is the same as the EL46 carb wise....................
It boils down to basic troubleshooting and realizing not to keep chasing your tail when a bad carb is a bad carb.
Numbers wise the carb issue is a mute point in the big picture, most likely less than 5% of all units and in reality after getting rid of misdiagnosis, less than 1%.
There will be problems with the EL50 also, just give it time.