Most of the time, I'm not disappointed. But I try to be more conscious now of how deceptively easy it is to take such things for granted. Think of the Internet as a series of gifts, freely given by the majority of its inhabitants. Someone has an interest, they compile their knowledge and put it up for anyone to find. That's a pretty nice thing to do for someone they've never met and possibly half a world away.
Web sites rise and fall.
So, if there's some resource you particularly appreciate or someone whose insight you've valued or even just some on-line business where you can finally get everything you've ever wanted, you might take the time out to tell the person involved. It's happened to me before, and I always felt a twinge of regret. You can, I've discovered, become a bit too attached to what is familiar. Time moves on, people change and sometimes you need to break out of familiar patterns. And we all need to shut up and go away, every once in a while.