I reached that state just a couple of days ago. Upgraded cartridge and bought tube linestage in June. bought a Bob Latino tube amp in November. Weak link was Moon 5.3 phono stage. Bought a Whest ps 30rdt-special edition. I live in a rural area, so don't get much opportunity to hear equipment in stores or the like; Didn't realize you can hear changes in prat and timing, but not have a fleshed out sense of drive. The Whest brought it all together. drive, Timbre, and space just exploded. When you finally get it where it works, kick back and enjoy it.
Done, really done!
The last component upgrade I did was in December 2015- 2 years ago and since then I’ve had zero interest in any component changes. I’m done, I’m really done! My system is excellent and there’s nothing I feel I can seriously upgrade that would be worth my while. What a terrific place to be in!