I've been flying glow engines for over 50 years. The only people I see and hear calling for the doom of glow engines are those too damn lazy to clean their planes and only play with foamy toys.
If you are in this hobby for your love of planes, the artistry of building one, and then seeing it fly-- You, my friend, are a true hobbyist. You are the one that loves seeing the fruits of your labor fly and fly the way you expected it to fly. If you enjoyed wiping the castor oil off the wings and fuselage while checking for any damage and all the while thinking of ways to make it better-- you are a true hobbyist.
If you are a person that orders your foamy or arf online, charge the battery, and go to the local park to fly it, and then throw it into the trunk of your car, where it will sit until you get the urge to play with it again -- well, you are just an over grown kid with a toy.
Now everyone can rant and rave about how I have insulted electric fliers (boys with toys).
And wait for it, wait for it - - - The "I don't have time to build !!!" excuse.
Frank