I flew on the top deck of a 747 for the first time about 18 months ago. Boyhood dream fulfilled, but sadly old and tired these days. Aircraft have moved on.
62A/K is the place to be. Once turned down an upgrade to First, in an aisle seat, to stay in 62A.
You’re right, though, planes have moved on. Sadly. There isn’t the same frisson of going upstairs in a 380, and no matter how good the 350 and 787 are, they just lack that special something. 1A/K is the closest vies to sitting in the cockpit, just with a much better wine list.