Oh, what the heck.
Why not a class for sub 500, sub 400 and sub 300 square inches while we're at it. I think an equally good case could be made for a monoline stunt event, a throttled J-Roberts three line event, three sizes of electrics (don't know much about them...how about 60 watt, 100 watt and 150 watt, like light bulbs). How about monokoted airplanes only events and/or designs using only foam wings or Detroiter wings?
Each of those suggestions could be supported by the same rationale as championed on this thread for the sub 600 square inch event. Each would provide an event catering to narrowly defined specific groups. Each would also, however, require all of the support staff, time, circles and trophies to be demanded from those willing to put on a contest. You'll argue that no CD has to hold every event but my response to that would be...which ones would the CD leave out? What if he picks the wrong events and ends up with two circles and ten trophies going to waste while people who decided to try out event B find that only event C was going to be held so they stay home. How many entries in any of the proliferated events will constitute success? If that "success" is achieved at the cost of fewer entries in other events will that be considered a positive or a negative result?
Guys, a discussion of additional events "MUST" include consideration of the potential negative aspects of an unending spiral of unique, narrowly defined, concepts that sound cool to those that want to fly them but must be supported by those willing to host them. If you end up with 10% more fliers at a contest but administration of the contest requires 50% more effort and resources; is that a good thing? Do 15 fliers flying 10 events make for a better contest than a dozen flying one?
We can point fingers at age and old timers for the demise of other events but you can't do so without recognizing that pretty much all of them tried to "save" the event through proliferation and/or simplification. More than any other CL even stunt has militated against both (including a particularly unappetizing debate over "ultimate" simplification in the recent past) and has continued to flourish. To suggest that consideration of those historical aspects are not worthy of discussion with respect to more and/or simpler events is burying our heads in the sand.
I restate my belief that airplanes such as Bob suggests can be fully competitive with the best there are out there now if modern powertrains and design optimization are utilized (neither of which is against the current rules). All it takes is the desire on the part of competitive fliers to do it and lead the way.
Ted