You guys are kidding about the RF interference right? Seriously, if you don't do anything dumb and follow the simple rules of engine and servo installation you will never get interference. If you range check your airplane like you are supposed to do you would catch it before you crashed an airplane. An airplane that does not get RF interference won't just suddenly get it years later unless you do zero maintenance on your airplane and have things falling off of it.

I have been flying gas engines for 20 years and have never encountered RF interference from my ignition. IMHO RF interference does not belong on the list as a usual problem or risk.

Also not on the list, (mostly tongue-in-cheek)

If you run gas...
Your radio face-plate won't delaminate from having glow fuel on your hands.
You won't smell like you went flying from standing behind a glow motor during start up.
You won't die slipping and falling in a glow fuel spill.
You will always have fuel for the weed-eater to do yard work.
Your airplanes get old from 2500 flights not from fuel soak.
You get to build an addition on your house to hold your giant airplanes, thus increasing your property value.
You get to own an additional (giant sized) vehicle just to transport your giant airplanes. The neighbors think your loaded.