RE: Why is CL losing popularity?
Gary,
You are correct, MAN switched to all RC several years ago. I let my subscription expire several years ago.
Flying Models has managed to continue covering multiple disciplines. I have subscribed to it for many years.
And of course, Model Aviation still covers all types.
The best all CL magazine I know of is Stunt News. Though it is full-size, officially it is a newsletter that you receive when you join PAMPA (Precision Aerobatics Model Pilots Association). It is always full of information. It has lots of advertisers for cottage industried that create some of the old (and new) CL kits, and rework engines for a good dependable stunt run (whichever type you want).
There may be other CL mags that I do not receive.
George