My opinion is solely based on a 17 year old in my house/what I hear him/his mates listening to/what they tell me they're listening to over a period of a few years - Trust me, there's no hint of radio (FM or net) anywhere there! It's the online streaming methods stated above which they rely on for anything music related! When it comes to radio (especially FM) they ain't interested & it's referred to as something his grandad would have on in his car! (Smooth FM) This is exactly why nowadays you don't have kids running FM pirates, it's all big (or middle aged) men in there 30's/40's/50's with families who have been plying their trade in it from the 80's/90's. I was involved with pirate radio in London as a DJ for around 20 years from the late 90's & have seen exactly that trend with my own eyes over the years so I know what I'm saying here is fact.
Less of the middle aged too by the way! Mid-30's isn't quite there yet! You're probably older than I am!