Looking at a segment of traditional, sport (leisure) aeromodelling world-wide, including control-line, and R/C, I would still say a large choice of power is glow (>40% for R/C and >90% for C/L) - since the majority of aero-modelers today are remnants from the last century. In contrast, free-flight's form of power breakdown in descending order of popularity would be unpowered, rubber power, glow power, electric power, and CO2.

Here's what I think a power breakdown of R/C looks like - taking into account all facets (i.e. pattern, pylon, heli, sailplane, slope, jets, scale, sport, etc.*) based on club level evaluations -

Year 2021 -

Glow power: 45%
Electric power: 25%
Unpowered: 15%
Gas power: 10%
Turbine power: 5%

* Not including C/L or FF