I got tired of nitro planes, messy and expensive fuel compared to battery or gas engines. I changed to two stroke gas some time ago and I really enjoyed that change. The Hex was my first encounter with batteries and I am very impressed with there performance which will continue to improve as technology escalates in the storage of energy, we are starting to see that now. Gas engines compared to nitro are bulky in pound for pound performance, and unless someone develops a miniature turbo or supercharger there effectiveness in helis is very limited.
And I think that most people would agree that a nitro heli blowing more smoke that a steam train looks rather ordinary. IMO