Call me ignorant if you want. Does not bother me even an iota. I will go the grave happier than everyone who is condescending.
So glad you found happiness and that you don’t expect to hear any areas of the sound that might make you keep trying for better sound. Interesting the way you're posting it here in a spirit of triumph over those who (it seems) have spoken negatively to you. I guess you showed them!
Just speaking personally, I don’t have upgrade-itis either, but I also have not stopped looking for improvements. This is a joyful and fun process for me because I enjoy experimentation, conversation with other hobbyists, and pushing the limits of what I can notice. I do this also with the books I read, the places I travel, and the things I write. For me -- again, just personally -- posting a statement that I was "done" (i.e., not striving, happily, for new experiences) would be a statement of resignation. But that’s just me.