I've been in maintenance for about two years and I'm still counting calories and I'm still pretty detailed about it. I plan out my food for the day to be under an certain number of calories and log everything I eat to make sure I come in under goal. I do have off-plan meals and even off-plan days, but I had those when I was losing weight too. Now they are just less stressful because I have more calories available for them.
But I'm definitely not counting calories forever. Once I get to 80, all bets are off. If I manage to live to 80, I'm eating whatever I want. I figure, 80 years is a pretty full life. At that point, I can die of a heart attack from eating fatty and sugary foods with no regrets. And, hey, this way I won't need to save as much for retirement.
Also, at least for me, the idea that life would somehow change once I got to goal was a big myth. My weight goes up and down. In the two years I've been in maintenance, I think there have really only been a couple of months when I ate at a true maintenance level. A few pounds creep on when I'm not looking

and then it takes two months of a reduced calorie level to get them back off (it's so easy to gain and so hard to lose). And I don't think I'm the only one--at any point, I think probably about half of us in the maintainers forum are trying to lose a few lbs.
So I think it's probably realistic to assume that even once you've reached your goal weight, there will continue to be periods where you are trying to lose weight. Even if you don't count calories when you are maintaining, you'll probably go back to counting them when you hit those periods where you need to lose.