To answer your question with another question. When is the last time the fuel injection "went out" on your car? And that's a much more complex system than most any bikes at the moment.
My point being is people tend to worry mostly unessasarily about tech. Truth be told if something does fail it likely to be either a rubber threw wire (easy fix) or a gummed up injector (easy fix) or a bad fuel pump (easy to diagnose and fix). All easily fixed and easy enuff to diagnose.
I have had ALOT of cars and bikes both of the carbureted and fuel injected varieties. The ONLY ones I have ever had fueling issues with have had carbs. And yes they were easy enuff to fix but still required removal of a carb and carful disassembly and reassembly witch is far more labour intensive than replacing an injector or checking a few wires.
Keep in mind fuel injection has been around for over 100 years and electronic fuel injection has been around over 60 years it's not something new and scary anymore.