I think the experience you report is fairly typical and fairly understandable, when you think about it. The first time a speaker blows us away (for whatever reason), it's probably a quantum leap over the dreck we were used to listening to. Then, as you stay in the hobby, you get used to listening to better and better gear and the new things you hear are more incremental than monumental improvements, more evolutionary than revolutionary to your ears.
That being said, a speaker like the Vandy 7, properly set up and with good source and amplification, still still make these jaded ears take notice.
And, no, I am not affiliated with Vandersteen, though I do own some of their speakers (though unfortunately not the 7s!).