i was going to respond to Tim on that thread, but thinking about it, seemed like it's an important enough subject to justify it's own thread so not to comingle it with the KL Audio thread.
Yes, the topic deserves its own thread, and thanks, here we have it.
Here is the context on my comment on the KLAudio thread:

I find this question equally interesting:
How confident are we with our confidence that "I am done."
It's a bit of a slippery slope. One might find oneself saying: "I was very confident the last time I thought I was done, after I spent the big bucks on that preamp I'd lusted after for years." And then in another year you find yourself lusting after something else. "I thought I was done then, but ... just one more hit and I'll be done." Right. I get out and it drags me back in.
A few comments ...
If you are a gear head, like many on this forum, you may never be done. I guess that's OK. Your satisfaction comes from trying different gears.
As others have noted: you might be done when you pay less attention to your system and more attention to listening to or acquiring music.
You are probably done when you feel you've truly met your goal. How many of us have a goal that we can articulate? (There's another thread if someone wants to start it: what is your goal in audio?)
Is your goal expressed in terms of your system or is it expressed in terms of the music you enjoy? If it is in terms of your system, you may not be done for a while -- there are always new toys to try. If your goal is expressed in terms of music -- how you think the music you like should sound -- then you, imo, truly have a goal, a target that you should be able to tell when you've reached it.