Everyone wanted to write like Alan Moore and Frank Miller after Watchman and DKR, not understanding that it was neither creators intent that EVERY comic should read like that. This is the result of a long process. I'm somewhat hopeful that we might eventually see a return to all-age comics if digital comics catch on with kids. 

Nobody at Marvel or DC really wants to admit that the bulk of their characters (outside of things like Vertigo that were intended to be adult) are inherently juvenile. Occasionally Brevoort will say as much, or some other honcho, but the proof is not in the pudding.

I've done pull lists at shops, but that "kiddie" book came to my mailbox through Amazon. I understand that comic books have to hit a sweet spot in issues sold, but it's not like the publishers equally market their titles these days.

I still buy comics, but I know that when I reach retirement age (still a little while away), I will not be able to afford Essential/Showcase/back issue titles, not on a state pension. I'm just one individual, other people's circumstances will be different, but the point I am making is that there may come a time when the older generation, who have bought comics for decades, won't be able to afford regular purchases of comics. I've actually reduced my comics bill by a third recently, due to finances.

When that happens, and we'll all reach 65 one day (here in the UK, the retirement age may one day reach 70), we may have less disposable income. Some might be wealthy, but some of us may have to reduce our entertainment budget. So, as Mr. Byrne and others have said here before, new blood is needed. The forty and fifty-year old guys who buy comics won't be around forever.