Can one ever be "done" in this hobby?

I beleive it has a lot to do with creating that "1st time reaction" why do we upgrade? Because we have become bored with what we have. On  the "Happy Scale" I was just as excited with the first impression of my first higher quality system as I was with my first impression of recent acquisitions that are much better and 10 times as expensive.
The best your new upgrade will eversound is in the first week of listening to it. 

We try to recreate that feeling with most things. Desensitivity to any thing can be very dangerous if you don't have a level of self control. Some times you just have to turn that system off or listen to your second system for a while or drive the grocery getter instead of the Ferrari to regain the level of excitement people thirst for.

So can we ever actually be done? Only when we don't care anymore and move on to something else. 

I get satisfaction from accomplisment. I actually take offense to you telling me to get a new hobby. I did not say I did not enjoy it. I merely pointed out that humans become desensitized to almost anything when repeated enough. . Why did you do renovations to your system? I am guessing because you tired of it and wanted something better. Which proves my point. Change is the spice of life. 

Nice attitude on your retirement. It is how I live my semi retired life (by choice) as well. Gotta keep it new and get the thrills. 

To the original post.

I actually think you can be done. But only if you beleive there are actually two different hobbies here. The audio hobby and the music hobby. I have to say I am mostly on the audio gear side. So as long as I focus on sound I will always be searching for something different and or better. That's why I constantly rotate speakers. I really like my power and pre amp so only on ocasion will I switch to my vintage Marantz, Sansui etc receivers. I have 3 TT's and switch them on ocasion as well. 

People who focus mainly on the music can be done with the Audio gear side. What is most important to them is the music. On what it is playing is not the most important thing, just that it is playing. Clearly evidenced by the mobile players now in millions of peoples hands. They are way better than what they used to be but not what most of on here would call great sound. Sure, "music people" if financially able,  will search for a system that suits their needs but it is still all about the music. 
So I would say in reality there is actually two different hobbies here joined by one commonality, the music.

I think I am going to put out a seperate post on the topic. Is this actually 2 different hobbies.