CaptainWill: 2. Genre Death - Classic genres like the point and click adventure have died out.
I don't really see the point-and-click adventure as being extinct, even if its Golden Days are definitely over. Granted, the big companies like LucasArts and Sierra eventually abandoned it and it looked pretty grim for the genre but then adventure fans and indie developers helped revive it on the internet and now the new generation of adventures is even sold in stores again. My only regret is that in many cases the genre seems more undead than truly resurrected, dwelling too much in the past instead of coming up with innovations and original stories. But there are exceptions, and then again, you probably can't re-invent the wheel all the time. In the late 80s / early 90s the adventure genre was new and exciting but 20 years later people looking for innovation will probably look elsewhere, for the next big thing.
I think it is also true that the cultural changes of the last 20 years are not really in favor of adventure games which explains why they aren't mainstream. You need a lot of time and patience for solving the sometimes really obscure puzzles. I don't know about you but I often find I don't have this patience anymore and I'm doubtful if today's kids would have it at all. Just try to watch the cartoons and TV series of your childhood and then compare them to the kid's stuff of today. You will find that the pace has become so fast today that the old shows will seem incredibly slow in comparison. It's kind of sad but I imagine it's very hard to make a living as a game developer if you try to swim against the stream.
Back in the days I'd go to a friend's house and we'd play adventure games together because two people have more ideas than one and one game would keep us busy for days or weeks and it was great fun. Nowadays, with the overwhelming supply of games (even adventure games) and all the real life chores, I notice I'm not willing to spend a lot of time on irrational puzzles anymore, especially not when playing on my own. It's become incredibly easy to find walkthroughs on the internet, so there's no necessity to dwell on a puzzle for long anymore. But that takes away a big deal of the experience, the sense of achievement, the pride of being able to figure out a puzzle on your own etc.
Add to that that others here have complained that new games are often too short and you can imagine why point-and-click adventures might not be very lucrative for big game companies today. You need to put a lot of energy and thought into them, so I bet they cost a lot of money to produce. But you can play through them in a couple of hours and then complain it was too short and has no replay value (regardless of whether it was so easy that you could rush through it or so hard that you decided to speed things up with a walkthrough).
Given these circumstances I'm actually glad new point-and-click adventures are still being produced. I just wish I could appreciate them today as I used to back then. :(