In Europe here is quite a big descent in car audio scene. Only in a few countries scene is still running strong - Germany, United Kingdom, Italy. If we look at the whole world not so different situation - I can see the same thing. USA is still strong (at least stronger than EU), far east is booming - very strong scene that is still growing fast.
The true car audio fanatics will always build our own systems no matter of what, but younger generation is at question here - Factory systems becoming better and better, no problems with optical integration, no need to invest big bucks......and some other things like - youngsters dont want to invest time to educate themselves on acoustic and fabricating, they dont have money to spent on car audio, they dont have skills, dont have willingness to work on their systems, they dont give a fuck for anything except for their phones and tablets......